This morning Malware Domain List tweeted a 0/57 detection malware PDF which was/is not detected as malware by any AV product on VirusTotal.com
more here.........http://blog.malwaretracker.com/2015/03/0-detection-pdf-with-external-link-to.html
more here.........http://blog.malwaretracker.com/2015/03/0-detection-pdf-with-external-link-to.html