See: http://killmalware.com/kampfsport24.eu/#
WordPress Version
3.5.1
Version does not appear to be latest 4.5.3 - update now.
Linked Javascript
Compromised sites will often be linked to malicious javascript in an attempt to attack users of your WordPress installation. Look over the listed javascript, you should be familiar with all scripts and investigate ones you are not sure. In addition removal of unneeded javascript will speed up your website.
HacKeD%20By%20Mr.Kro0oz.305%20%21%20Defacer_files/ga.js
HacKeD%20By%20Mr.Kro0oz.305%20%21%20Defacer_files/ga.js
Serverfault long abused: http://blog.immeria.net/2009/06/google-analytics-targeted-by-hackers.html
→ https://aw-snap.info/file-viewer/?tgt=http%3A%2F%2Fkampfsport24.eu%2F&ref_sel=GSP2&ua_sel=ff&fs=1
→ http://toolbar.netcraft.com/site_report?url=http://kampfsport24.eu
hoster has a bad web rep: https://www.mywot.com/scorecard/w89.rzone.de?utm_source=addon&utm_content=warn-viewsc
routing and zone issues: https://telekomhilft.telekom.de/t5/Telefonie-Internet/Routing-Probleme/td-p/962286
and https://www.virustotal.com/en/domain/docks07.rzone.de/information/
polonus