There are DNS issues, see: http://dnscheck.pingdom.com/?domain=www.rso-sofia.eu&timestamp=1400075977&view=1
Javascript check: Suspicious
“login”>login |


Side wide check: Suspicious
idaj&usg=afqjcneqy2ouezfgehmei7skdi_aw01qpg">im cache11 ð°ð¿ñ� 2014
Included scripts check: Suspect - please check list for unknown includes
hxtp://www.rso-sofia.eu/counter.php

Sign site was attacked, compromised is htxp://www.rso-sofia.eu/test404page.js

Possible avast detection is because of malware on other domains on same IP: http://urlquery.net/report.php?id=1400076448756

polonus
and PHISHING on this freeserver dot me IP: http://support.clean-mx.de/clean-mx/phishing.php?id=3736428

You have 2 script blocks in the same file, try to put them in a separate file.
Links To External Script Files - 1
Script URL Type
htxp://www.rso-sofia.eu/counter.php text/javascript
put scripts together and link them from an external files rather then put them in the same file as the main page.
See: http://fetch.scritch.org/%2Bfetch/?url=http%3A%2F%2Fwww.rso-sofia.eu%2Fcounter.php&useragent=Fetch+useragent&accept_encoding=

polonus