Hackers declaring support for Islamic State jihadists appear to have taken over a Facebook page promoting North Korea’s state-run airline Air Koryo and derided Kim Jong-un as a “crying pig”.

The hackers replaced the page’s photo banner with the black and white flag of Isis and filled its timeline with pictures declaring support for the jihadists and mocking Kim’s regime.

One image showed Kim weeping at the funeral of his father, Kim Jong-il, in 2011, with the caption “crying pig”. The page’s profile picture was changed to an image of a fighter with his face wrapped in a scarf, captioned “CyberCaliphate” and “I love you Isis”.

Another photo showing Isis fighters was captioned “North Korea the communist thug nation and the Chinese communist thugs will pay a price for their collaboration with the enemies of the muwahideen”.

It is not confirmed that the Facebook page, which has 8,000 likes, is run by the airline. The South Korean news agency Yonhap described the page as Air Koryo’s Facebook account and said its earlier posts had been deleted by the hackers. A report by the website NK News in September said the page, which previously posted schedule information and news on aviation tours to North Korea, was operated by airline enthusiasts.

On Monday a group styling itself as the CyberCaliphate, using the same “I love you Isis” profile picture, hacked US Central Command’s social media accounts, forcing the military to take down the command’s Twitter feed.

Last month the websites of North Korean propaganda outlets and the homepage of Air Koryo were blocked for days after Barack Obama pledged a “proportional” response to a cyber-attack against Sony Pictures.

The FBI has said North Korea carried out the Sony hack in retaliation for the studio’s comedy The Interview, which centres on a fictional plot to assassinate Kim. North Korea has repeatedly denied involvement in the cyber-attack.