Prime Minister Malcolm Turnbull has reportedly been named in the Panama Papers as a director of a company that used the controversial law firm exposed for helping millionaires dodge tax.

Australian Financial Review reports Mr Turnbull was on the board of Star Mining NL, a British Virgin Islands company set up by law firm Mossack Fonseca to develop a gold mine in Siberia.

In late 1993 Mr Turnbull was appointed a director, alongside former NSW Premier Neville Wran, of one of Star Mining's subsidiaries, Star Technology Service.

Star Technology Service had been incorporated by Mossack Fonseca two years earlier.

A spokesman for Mr Turnbull told the AFR the prime minister was not aware the company had been administered by Mossack Fonseca.

There is no indication that the prime minister acted improperly.

More than 800 Australian clients of Mossack Fonseca are being investigated by the Australian Tax Office as a result of the initial leak.

Released last month, the Panama Papers have blown a lid on the shady world of offshore tax havens.

In total 11.5 million internal Mossack Fonseca documents, not all of which have been published, reveal how some of the world's most powerful corporations and wealthiest individuals use shelf companies and a global network of tax havens to dodge tax.

Yesterday the Panama Papers database was made publically available, exposing 118 secret offshore companies with links to Australia.

The new database can be searched by individual and company name and address, and shows links between those in the records.

But it gives no information, beyond their name, on the full identities of those behind the companies, nor of the underlying assets linked to the accounts.

The publication of the database comes as Mossack Fonseca announced it is filing suit against the International Consortium of Investigative Journalists (ICIJ) for the leak of information it says is false.

The law firm urged the ICIJ to cease and desist prior to the leak online, but it moved ahead with the release.