clamtk says i have two infected files

clamtk says i have "two infected files" in the scan summary. should i do anything about this and if so, what? there is nothing in quarantine. thanks, greg

shown is a copy of the readout from clamtk

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/home/david/.mozilla/firefox/mf0vpssx.default/Cache/8623CD0Fd01: PUA.Script.Packed-1 FOUND
/home/david/.mozilla/firefox/mf0vpssx.default/Cache/87037548d01: PUA.JS.Xored FOUND

----------- SCAN SUMMARY -----------
Known viruses: 859597
Engine version: 0.96.3
Scanned directories: 1803
Scanned files: 4008
Infected files: 2
Data scanned: 259.32 MB
Data read: 3870.69 MB (ratio 0.07:1)
Time: 126.857 sec (2 m 6 s)