well... At the time of publishing avast was only one AV protecting against this malware. It is more than 14 days now, so what has changed?
Sophos looks to be the second engine (GData uses avast!, so GData too). Sophos detect this malware as Mal/ObfJS-AJ which is probably some generic detection. Description can be seen here:
http://www.sophos.com/security/analyses/viruses-and-spyware/malobfjsaj.html
Dates from description says everything, so this looks sophos generic detections maight detect this malware before avast.
And how looks todays detections (more than 14 days after attack):
http://www.virustotal.com/cs/analisis/ccb0c368459322acd008d024e361a458
http://www.virustotal.com/cs/analisis/470fe4182ca7d5682dfaa6f8a8737ee5
Both files are real webpages downloaded from internet.
Regards