Hello, I’m the analyst responsible for the domain block.
The reason was that we’ve detected a cross-site request forgery attack on home router coming from that domain, particularly from this URL: hxxp://www.moneyperclick.net/gchrome.php. The attack and consequences are described in these Avast blog posts: https://blog.avast.com/2014/11/21/how-to-change-your-router-dns-settings-and-avoid-hijacking/ and https://blog.avast.com/2014/11/05/your-home-network-is-at-risk-of-cybersecurity-attacks/
Since the link is no longer valid, I’ve removed the URL block.
The other mentioned site noone.noone2.com is being used for the same kind of attack.
Regarding the site http://www.radiobrasilnovo.com.br/, I did not find any evidence of it being blocked by Avast.