I'm seeing this on another part of their website
http://na. square-enix.com
It appears that S-E may not even really use this area, instead using
http://square-enix.com/na (no virus in this version)
I called their customer support recently and had denied that any viral/worm activity exists on their [North American] website. I gave them the malware identity before hanging up; I just don't want to see anyone get hurt, on both sides of the web spectrum.
I pray they investigate it.
Luckily I use Mac AND Windows, and I guess if it wasn't for me using Windows, I would have been completely naive of this situation. I'm perhaps one of the few Mac users out there that
doesn't use the Mac version of Avast! (sorry Alwil, I have my reasons).