URL blocked from SVChost

Since today out of a sudden http://ipv6.msftncsi.com/ncsi.txt is detected as a malicious URL accessed by SVChost.exe.
Infection type is Mal, so I heard this URL could be in a blocklist?
This is a Microsoft page which Windows uses regulary to perform some network checks.

URL:mal means it is on a block list…for whatever reason

you may report it here if you think it is wrong
http://www.avast.com/en-us/contact-form.php