Re: Manipulate PDFs with Malware

["Adam Pal" <carpathin.wolf () gmx net>]

Hi Andre,

could you specify the context of the question or the risk you are refering to?
Given the facts below, no i cannot think at any easy way to modify this information, at all it would not realy make 
sense to modify it during the opening process (process could be detected). Also it should be one of the next steps to 
verify the payment data (validation) before process it.


Best regards,

Adam Pal
-------- Original-Nachricht --------
> Datum: Sun, 20 Jan 2013 23:55:14 -0700
> Von: Nick Clark <nick () clark-clan com>
> An: Andre Silaghi <andre.silaghi () googlemail com>
> CC: "security-basics () securityfocus com" <security-basics () securityfocus com>
> Betreff: Re: Manipulate PDFs with Malware

> Depends on how the PDF is formed. If they are just using an image or flat
> text, I cannot think of any easy way to do this. If they are using a form,
> and this barcode has a set attribute field, then you could probably search
> for the field and replace it with whatever you'd like to. 
>
> ---
> Nick Clark
>
> On Jan 19, 2013, at 10:59 PM, Andre Silaghi <andre.silaghi () googlemail com>
> wrote:
>
> > Hello everybody,
> >
> > Let me just explain to you a scenario before I ask my question about
> > it. You are starting to download a PDF file including a barcode which
> > is used to identify some payment information like the ammount of money
> > you have to pay and the receiver, maybe identified by another sequence
> > which is included.
> >
> > Would it be possible to manipulate this barcode easily before or
> > during the opening process of the PDF in order to change the payment
> > information in a way that the attacker's information is encoded there?
> >
> > Have you any experience with malware like this?
> >
> > Best regards,
> > André
> >
> > ------------------------------------------------------------------------
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> Securing Apache Web Server with thawte Digital Certificate
> In this guide we examine the importance of Apache-SSL and who needs an SSL
> certificate.  We look at how SSL works, how it benefits your company and
> how your customers can tell if a site is secure. You will find out how to
> test, purchase, install and use a thawte Digital Certificate on your Apache
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> certificates.
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> http://www.dinclinx.com/Redirect.aspx?36;4175;25;1371;0;5;946;e13b6be442f727d1
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------------------------------------------------------------------------
Securing Apache Web Server with thawte Digital Certificate
In this guide we examine the importance of Apache-SSL and who needs an SSL certificate.  We look at how SSL works, how 
it benefits your company and how your customers can tell if a site is secure. You will find out how to test, purchase, 
install and use a thawte Digital Certificate on your Apache web server. Throughout, best practices for set-up are 
highlighted to help you ensure efficient ongoing management of your encryption keys and digital certificates.

http://www.dinclinx.com/Redirect.aspx?36;4175;25;1371;0;5;946;e13b6be442f727d1
------------------------------------------------------------------------