Some scanners will detect defacements in side wide check...

See: http://maldb.com/petroevaluations.com/ & http://evuln.com/tools/malware-scanner/petroevaluations.com/
Either detected at a spam check: Suspicion of Spam

nguage" content=“tr”> hacked by_fatih <font face=“tahoma” st…

or at a side wide check: Suspicious

eq52o495z-d4m1ef_xfmxe9gslba">hacked by_fatih

pet

Whenever malcious then defacements are also being reported by avast! shield, not in this case.

Defacement Monitoring may help against such forms of abuse. Interesting to read and why back-ups are essential:
http://docs.fortinet.com/fweb/admin_hlp/5-0-3/FortiWeb_Administration_Guide/anti-defacement.html

polonus