Also being blacklisted here: http://www.avgthreatlabs.com/website-safety-reports/domain/hgads.com/

Excessive header info passed apache-coyote/1.1 (vulnerable to information-disclosure vulnerability and authentication bypass)
CMS:

Website also has a clickjacking vulnerability

CRLF Injection Attack code →
Read about attack → http://www.acunetix.com/websitesecurity/crlf-injection/
GET / HTTP/1.1[CRLF] x0DOA
Host: www.hgads.com[CRLF]
Connection: close[CRLF]
User-Agent: Web-sniffer/1.0.46 (+http://web-sniffer.net/)[CRLF]
Accept-Encoding: gzip[CRLF]
Accept-Charset: ISO-8859-1,UTF-8;q=0.7,*;q=0.7[CRLF]
Cache-Control: no-cache[CRLF]
Accept-Language: de,en;q=0.7,en-us;q=0.3[CRLF]

Response Header HTTP/1.1 404 Not Found
HTTP/1.1 404 Not Found
Server: Apache-Coyote/1.1
Content-Length: 0
Date: Thu, 07 Nov 2013 14:50:04 GMT
Connection: close

Referer: http://web-sniffer.net/[CRLF]
[CRLF]

polonus