WebRep is not exactly a malware indicator. You can use it on really bad sites but using it on hacked but legit sites is pointless as they will get cleaned and secured, but the rating will remain red. And as we know, pretty much any page can get hacked.
WebRep is more about what the page offers, is the offered content really "in theme" with the page, is it good, maybe you had really bad experience with some shop etc etc.
That's what is WebRep for.