MSUpdater Trojan is a malicious Trojan which spreads via spam emails that invite recipients to attend some conference, while the aim of the messages was to attack government-associated organizations. The fake emails, which include MSUpdater Trojan, bear a PDF attachment which supposedly announces an invitation for being at a conference, which potentially has some meaning for the recipient. By abusing zero-day security flaws within Adobe Reader, the PDF attachment issued the MSUpdater Trojan which pretends to be a ‘Microsoft Windows Update’ and remains undetectable to security programs. A…