My site is infected?

Hi everybody,
From a few days i got problem with my site… Some users of Avast! sends me an e-mails where they attach a file with information that my website is blocked and the infection is URL:Mal. I checked my site and i see that on some online scanners problem really exist. Can u help me find out what is going on? Big thanks! I just upgraded my Joomla! and removed some suspicious files. Can u tell me is there still an infection? Am i blacklisted?

Site url: hxxp://materacyk.pl
Site stand on Joomla 2.5.22 version.

https://www.virustotal.com/nl/url/aaba9af7e31d8bfd884ec451256473e279e20c85ed410f7c03fffd98fca0f34a/analysis/1403637965/
http://www.urlvoid.com/scan/materacyk.pl/

If you believe you have solved all problems, use the contact form to ask avast to deblock the site:
http://www.avast.com/contact-form.php

Thank you for your reply! I wouldn’t say that i believe i did that. I’ve just removed whole files that thought they were infected or suspecious. I know that the online scanners still shows some issues but i don’t know what can i do more to do it right. :frowning: Will the support tell me that there is something wrong if i will contact with them?

website is blocked and the infection is URL:Mal.
URL:mal is not a infection.....it means URL or IP is on a blacklist for whatever reason, it does not have to be infected

Yap, we spotted signs of Redkit EK on your website. I hope you have cleaned all of it, as I am unblocking it now:-)!