Virus on 1 website

Hey, so i get a torjan notification on a website i visited for the past 2 years without any torjan notifications before.

Note that its a government website and its not a virus.

The virus is appearing at the temp/cache folder.

Any idea why it happens? Its started today and it only happens on my PC and only at this specific website.

Other devices i have Bitdefender on it does not shows a torjan.