Hi Wheeler,
Can you pls show us some samples about it?
What the antispam appliance do you have?
Regards
Wheeler, Eric wrote:
I was trying to think of a way to block this but its rather difficult
when the email + the subject line + the attachment + the attachment
contents are different every time
-----Original Message-----
From: listbounce@securityfocus.com [mailto:listbounce@securityfocus.com]
On Behalf Of Banyan He
Sent: Saturday, July 21, 2007 9:41 AM
To: WALI
Cc: tony barry; Security Basics Forum
Subject: Re: New Spam Technique
Bad news, that pdf attachment contains the advertisement or the image.
Actually, there is no appliance works on this perfectly. The pdf size
should be big or small.
WALI wrote:
Read, the nuances of catching pdf spam:
http://www.techworld.com/security/news/index.cfm?newsid=9031
----- Original Message ----- From: "tony barry" <tony@no-bull.co.nz>
To: "Security Basics Forum" <security-basics@securityfocus.com>
Sent: Thursday, July 19, 2007 11:04 PM
Subject: New Spam Technique
Hi List,
We operate several mail servers with catch all accounts and have
noticed
a lot of Mailer Daemon 'delivery failed messages mails from genuine
sites (mostly German)arriving recently. It would seem the spammers
are
sending out e-mails with a PDF attachment and a forged senders
address
to bogus recipients at these organizations whose mail server rejects
the
message and sends notification to the forged sender. We have opened
one
attachment on an isolated machine and it was one of the 'watch these
stocks they're going through the roof messages (not exactly sure of
the
details as my German is a bit rusty). My concern is that there could
be
a 'payload' embedded in the PDF. Is this possible?
--
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Auckland
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http://www.simpleserverco.com
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---------------
Banyan He
Email&Web Security
MSN: banyan.he@hotmail.com
Skype: banyan.he
Email: banyan@rootong.com
Website: http://www.rootong.com
