False positive of a brazilian software?

Viruses and worms
1

Win32:Rootkit-gen [Rtk] ???
http://www.virustotal.com/pt/analisis/40bca19de02e379051c36d16e1d296f2

Difficult to say, but the program seems ok.
http://pt.wikipedia.org/wiki/Guia_cartoplam_são_paulo