http://malwareurls.joxeankoret.com/normal.txt
http://www.nictasoft.com/ace/malware-urls/
vx-archiv.at
http://www.exposedbotnets.com/
http://malwaretips.com/Forum-Virus-List
A list of domains that distribute malware: - http://hosts-file.net/?s=Browse&f=EMD
http://minotauranalysis.com/malwarelist.aspx
http://amada.abuse.ch/blocklist.php
More and more of them can be found here -
http://malwaretips.com/Thread-Places-to-find-malware (enter password malwaretips if it asks).
Hope so I contributed to some effort to improve BitDefender zero day malware detection (although it is already very good at it currently, but now seems it can be close to perfect in detecting all the latest malwares and remove them).
Please do reply if u found this post of mine useful.
Thanks 
Regards,
whizkidraj