http://www.virustotal.com/pt/analisis/f545b280cef01634ba9ff7725a259a3a
http://www.virustotal.com/pt/analisis/3611ccf97215f99517219102550c9ca8
http://www.virustotal.com/pt/analisis/808e58b457cbec9872d8f9ff019fecf5
???
Well the first one is mostly suspicious/generic with many reporting it as not-a-virus, hacktool, etc. so that one is debatable. avast isn’t alone in this as most of the major AVs also don’t find anything either.
The second is quite clearly undetected, but most of these detections are suspicious/generic/packed and again avast isn’t alone in this as most of the major AVs also don’t find anything either.
The third with only one hit and that a generic detection the jury is most certainly out on that one.
Perhaps this (items 1 and 3) would be a good sample to upload to the Anubis: Analyzing Unknown Binaries link polonous gave before, http://anubis.iseclab.org/?action=home.
Tech,
I bet all of them are actually FP’s.
If you think otherwise, why don’t you submit the files to our viruslab? (provided you own them)
BTW The folks over at the lab are now much more responsive then they used to be, in case you haven’t noticed… 
Cheers
Vlk
I’ve already done this, of course.
More responsive? ???