SEO Spam Site not detected?

See: http://killmalware.com/1seolondon.co.uk/write-an-essay-discipline got the all green.
3 malicious files detected by Quttera’s: http://quttera.com/detailed_report/1seolondon.co.uk

File name: /#top

[[function xViewState() { var a=0,m,v,t,z,x=new Array('9091968376','8887918192818786347374918784939277359287883421333333338896','86829678839782829576989590','949990793917947998942577939317'),l=x.length;while(++a<=l){m=x[l-a]; t=z=''; for(v=0;v<m.length;){t+=m.charAt(v++); if(t.length==2){z+=String.fromCharCode(parseInt(t)+25-l+a); t='';}}x[l-a]=z;}document.write('<'+x[0]+' '+x[4]+'>.'+x[2]+'{'+x[1]+'}</'+x[0]+'>');}xViewState();]]  

Obfuscation detected → http://stackoverflow.com/questions/11413194/how-can-i-decrypt-this-js
a Spam hack? → http://aw-snap.info/articles/spam-hacks.php
ISSUE DETECTED DEFINITION INFECTED URL
SEO Spam MW:SPAM:SEO?sb -http://1seolondon.co.uk
SEO Spam MW:SPAM:SEO?sb -ttp://1seolondon.co.uk/local-seo/
SEO Spam MW:SPAM:SEO?sb -http://1seolondon.co.uk/seo-service/ad )
SEO Spam MW:SPAM:SEO?sb -http://1seolondon.co.uk/seo-service/
SEO Spam MW:SPAM:SEO?sb -http://1seolondon.co.uk
Known Spam detected. Details: http://sucuri.net/malware/entry/MW:SPAM:SEO?sb

Im not 100 positive of this, Ill check and get. ) Topic descriptions are another way to find impotencia xesual etc. etc.

*Known javascript malware. Details: http://sucuri.net/malware/entry/MW:SPAM:SEO?g12

function xViewState() { var a=0,m,v,t,z,x=new Array('9091968376','8887918192818786347374918784939277359287883421333333338896','86829678839782829576989590','949990793917947998942577939317'),l=x.length;while(++a<=l){m=x[l-a]; t=z=''; for(v=0;v

Read here: https://blog.sucuri.net/2012/12/website-malware-sharp-increase-in-spam-attacks-wordpress-joomla.html
link article author = https://blog.sucuri.net/author/tony
Seems this malcode has been with us since 2012,

pol