It’s apparently Darkmailer2 month in Canada. One company got a grip on it, and two got much worse, in the December 2012 for Canada.
AS 7788 MAGMA-COMM, bought in 2004 by PRIMUS Telecommunications Group, peaked in the second week and then got a grip on its darkmailer2 spamming. AS 11342 PATHWAY really gave AS 32613 IWEB-AS a run for its money; both seem to have a darkmailer2 problem. Pathway went from 2,871 spam messages seen by CBL in November 2012 to 21,593,775 in December 2012: that’s 7,521 times. However, iWeb once again won the spam-spewing month in Canada!