The malware was found in the official FFXIII site though? Strange... http://na.square-enix.com/ff13/ The file it blocked is a js files, from its name it looks innocent, maybe it's just a false positive?
nonononono That's a very real malware block. I just cleaned my laptop of a virus, quite a few file of which were js.
That is probably a coincidence, js files are javascript. I suppose someone could give viruses out through js files, but they're not evil or anything, haha.
I know what they are, I use Avast! too lol, and every time I've gotten a particular virus it's always from a site I don't expect. Not all the infected files are js either, but a fair number are. I'd do a system scan just to be safe, Kubo.