Detected as spam site?

See: https://www.virustotal.com/nl/url/1f849d01f9115ee35d557e6712926f3c10a60f133939ef272db0ba64124def72/analysis/1423330330/
Nothing here: http://quttera.com/detailed_report/www.osc.pl nor here: http://sitecheck.sucuri.net/results/www.osc.pl
Bad web rep: https://www.mywot.com/en/scorecard/www.osc.pl

polonus