According to Symantec a new spam with malicious attachment is circulation aroung the globe. The Subject and Content of the SPAM is something related to the destruction of Internet. Subject of this spam look like ..

Secret Plan To Kill Internet By 2012: Leaked?

PLAN TO KILL THE INTERNET BY 2012- Documented

2012: The year the Internet as we know it dies...

2012: The Year The Internet Ends

This Spam contains "doc.pdf" file attachment which contains malicious code (Trojan.Pidief.A). When the file is opened, the code will execute and the system will get infected. The infected machine starts to sent bulk of spam email to the internet. 70% of this is originating from United States of America.

Source: https://forums.symantec.com/syment/blog/article?blog.id=spam&thread.id=109