hey and welcome to the forum based on the result from the virustotal result i would say its a false threat:

http://www.virustotal.com/url-scan/report.html?id=be0873f7335ebec440adfa21924b3261-1304223613.

you could submit that to avast so they chance this.

fallow this instructions:

http://www.avast.com/contact-form.php?loadStyles

good luck