How to evaluate clamscan results?

• "PUA" means "Potential Unwanted Application"
• "Html" means a webpage

And it ends there. You should have far more notices otherwise this is a false positive. This (dutch) shows:

PUA.Win.Tool.Packed-177         
PUA.Html.Trojan.Agent-37075     
PUA.Win.Trojan.Xored-1

... pointing to Windows. What else do you see with that line containing 37075?

Example of a clear malware problem in the browser ...

PUA.Phishing.Bank Found

That shows a site that is considered a phishing.

I would ditch clamav for linux though. 99% are false positives. You are better off using firefox with noscript, ad aware and flashblock.