send it to virus@avast.com with the password for the zip file (if you have password protected it) , the link to this topic in the body of the email and subject as : potential malware.
Actually it should be detected in the next virus database update since GData is already detecting it and that uses the same detection and virus database that Avast does (that virustotal link showd GData using a VDB with todays date and avast with yesterdays database).