A pair of shady, Soviet-born businessmen who helped Rudy Giuliani dig for dirt on Joe Biden were busted on charges of funneling foreign cash to Republican politicians and using a phony corporation to donate to a pro-President Trump super PAC, the feds said Thursday.

The businessmen, Lev Parnas and Igor Fruman, were nabbed Wednesday night at Dulles International Airport in Virginia while trying to catch a flight with one-way tickets to Vienna, and appeared in federal court in Alexandria, Virginia on Thursday, wearing T-shirts.

Judge Michael Nachmanoff ordered each to post $1 million bond, surrender their passports and be subject to home detention, among other conditions, before they can be released from jail, where they remained.

Parnas and Fruman in May 2018 contributed $325,000 to a pro-Trump political action committee called America First Action, and the donation was falsely reported as coming from an allegedly US-based natural gas company, according to the indictment and other public records.

The two men falsely claimed the company, called GEP, was “a real business enterprise” and that “its major purpose is energy trading, not political activity,” the indictment said.

In fact, the feds said, the company had no real business. It was unclear where the money originally came from.

Manhattan US Attorney Geoffrey S. Berman said the pair made illegal donations to advance their interests and those of a Ukrainian official who wanted then-US Ambassador Marie Yovanovitch fired.

The two worked with Giuliani and a Congressman, identified by the Wall Street Journal as former GOP Texas Rep. Pete Sessions, who both urged Trump to can her despite her long and unblemished career as a diplomat.

Trump — facing impeachment proceedings for asking Ukraine President Volodymyr Zelensky to probe the Bidens — canned her in May and called her “bad news” in his July 25 call with Zelenskey.

“The defendants broke the law to gain political influence while avoiding disclosure of who was actually making the donations and where the money was coming from. They sought political influence not only to advance their own financial interests but to advance the political interests of at least one foreign official – a Ukrainian government official who sought the dismissal of the US ambassador to Ukraine,” Berman, a Trump appointee, said during a news briefing in Manhattan.

Giuliani told Reuters last week he had spoken to both Trump and the State Department about Yovanovitch, who he claimed was biased against Trump.

US diplomatic officials who knew her said that some officials in Ukraine wanted her gone because she was too aggressive in demanding that the country do more to curtail the country’s notorious corruption.

Yovanovitch is scheduled to give testimony in the House impeachment inquiry as soon as Friday.

Giuliani told The Wall Street Journal — which first reported the arrests — that Parnas and Fruman were headed to Vienna on Wednesday evening for business reasons, but would not elaborate.

The paper reported he had lunch with the two at the Trump International Hotel in Washington on Wednesday just hours before the duo was arrested.

Parnas a Ukrainian, and Fruman, who was born in Belarus, helped introduce Giuliani into top Ukrainian political circle, and Giuliani has said they helped him probe the former veep and his son, Hunter Biden.

Their lawyer, Trump’s former lawyer John Dowd, declined to comment on the arrests.

Trump said Thursday he didn’t know the pair. He has denied wrongdoing and described the impeachment probe as a partisan smear.

Parnas and Fruman were each charged with two counts of conspiracy, one count of false statements and one of falsification of business records.

Prosecutors said Parnas, Fruman and others also conspired to funnel donations to state and federal candidates in multiple states to benefit a planned marijuana business funded by an unnamed foreign businessman, but the business never opened.

Two other people were charged in the indictment, David Correia, a US businessman, and Andrey Kukushkin, a Ukrainian-born US businessman. Kukushkin was due to appear in court later in the day in California.

Photos from Parnas’s social media accounts show him meeting on with Trump, his son Donald Trump Jr., Sessions and Republican Rep. Kevin Brady and former congressman Carlos Curbelo.

Parnas told Reuters last month that the FBI was investigating him but said he did not know why, that he did nothing wrong and that he was not trying to hide the source of the $325,000 donation to the pro-Trump PAC.

Kelly Sadler, a spokeswoman for America First, said the PAC had not spent any of the money and that it was being kept in a “segregated account” until the issue was resolved.

Federal records show Parnas has donated $25,200 to Republican candidates and political groups since the 2016 presidential election, including $2,700 to Sessions and $2,700 to House Republican Leader Kevin McCarthy.

Fruman has donated $44,201 over that period to Republicans, including Sessions, the Republican National Committee and Trump’s presidential campaign.

The top Senate Democrat, Chuck Schumer said Giuliani should be questioned under oath following the arrests.

Both men had been asked to produce documents and give testimony to the House committees leading the impeachment drive.

Parnas had been scheduled for a deposition with House lawmakers on Thursday, with Fruman scheduled on Friday.

Dowd had said the deadlines could not be met, and House Democrats on Thursday issued subpoenas for the men to hand over the documents and testify at a later date.