This is a English forum about the following products : Avast Free Antivirus / Pro Antivirus / Internet Security/ Premier
This is not the viruses and worms forum, nor the Portuguese one.
Any domain hosted on afraid.org can be used by other persons for dns hosting without your control. It happened for your domain, it was misused for malicious purposes - in that case, when nobody has control on subdomains of domain (DNS hijacking), we block the whole domain in order to protect our users. For you, the solution is most probably only changing the dns hosting and letting us know later.