Ubuntu – Meaning of Total errors on result of Clamav scan

Basically, if you didn't perform any bank payments on the computer you've downloaded these on between visiting these dodgy web sites and posting this question you're safe...

What to do if you did perform bank payments:

• Contact the anti-fraud department of your bank immediately!
• Keep the date/time you started the conversation with your bank in a secure place (Not your computer! A paper agenda would be perfect)
• From this point in time, you're protected according to EU rules and regulations (verify your statutory rights if you're outside of the EU)
• Clear your cache

Nothing more to do!

This is probably just a false positive. /usr/share/mime/mime.cache is a generated file of all known mime types on your system. It's not an executable.

Virus scanners detect malicious software by sets of known fingerprints (hashes). This model leads to some false positives, inevitably. Perhaps it's a coincedence a known Windows virus matches the fingerprint as found on a Linux system, perhaps it's because the fingerprint just matches a certain MIME type pattern that will match inevitably on any Linux system...

For now, I wouldn't worry about it, but just contact the ClamAV team to ask whether this is a known issue with them already.

Also make sure to stay updated with the most recent ClamAV fingerprints (freshclam).