GET /piwik/piwik.php?action_name=?

Hi I have strange request on my web server,

GET /piwik/piwik.php?action_name=*******%20********&idsite=48&rec=1&r=595131&h=17&m=59&s=21&url=http%3A%2F%2Fwww..com/ueberunsF&_id=7e7ef0134044a495&_idts=1370365710&_idvc=39&_idn=0&_refts=0&_viewts=1372609701&cs=windows-1252&pdf=1&qt=0&realp=0&wma=0&dir=0&fla=1&java=1&gears=0&ag=1&cookie=1&res=1280x1024 HTTP/1.0" 404 411 "http://www./ueberuns/" “Opera/9.80 (Windows NT 6.0) Presto/2.12.388 Version/12.15”

I use the no Piwik website is infected there ?

What’s the problem?