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2 forms found in the DOM

https://www.avanan.com/search-results

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 1. Blog Home
 2. Attack Briefs
 3. PDF-Based Attacks on the Rise: Here's How Deep Learning Can Prevent Them


PDF-BASED ATTACKS ON THE RISE: HERE'S HOW DEEP LEARNING CAN PREVENT THEM

 * Posted by Jeremy Fuchs on June 27, 2023
   
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In June, 43% of all malicious files were PDFs, indicating a significant rise in
their use for malicious purposes.



'Deep PDF', integrated into ThreatCloud AI, protects against various vectors
including email, web downloads, HTML smuggling, SMS messages, and more, keeping
Check Point Quantum and Harmony customers safe and secure against global-scale
phishing campaigns. 

The integration of 'Deep PDF' into ThreatCloud AI is a game-changer in the fight
against global phishing campaigns. It conducts a thorough examination of PDF
structures, URLs, and images to pinpoint phishing layouts.

By deciphering abstract features and differentiating between malicious and safe
files, it can detect a vast array of campaigns that may have been missed by
other vendors. 


ATTACK IN ACTION



The malicious PDF file masquerades as a legitimate 'DocuSign' document, luring
unsuspecting users to a fraudulent webpage where they are asked to enter their
login credentials, including the recipient's email address.

Within DocuSign, 'Deep PDF' easily detects that the phishing URL is readily
accessible, and the URL itself contains unsafe characteristics, such as an '@'
symbol:
(https://ipfs[.]io/ipfs/QmTLKnENpVmWBA579ME8hVU6KQxPShAxNtDTnsFZYRL5UW?filename=index.html#finance.division@nanaimo.ca).

After clicking on the “VIEW COMPLETED DOCUMENT” button, a web page opens and
requests the user to input their login credentials.



Thanks to 'Deep PDF', the user was protected from opening the malicious webpage
as it was blocked after scanning the PDF.

Further analysis of the webpage's source code revealed that it was created with
the help of 'glitch.com', a website that enables quick and easy creation of web
pages.



Upon conducting a more in-depth analysis of the traffic, it was discovered that
the HTML file had embedded JavaScript code, functioning as a universal template
for stealing information. The JavaScript code was particularly noteworthy, as it
contained a comment reading "//new injection//," indicating that the attacker
had altered the URL to redirect the user to their own domain.



After the user submits the password request, the credentials are sent to this
webpage: https://aurigabar.ch/docucas/logs.php.



 

Once the user submits their password request, they are redirected to a fake
DocuSign login page that mimics a timeout to deceive the user into believing
they need to verify their identity. 


FINAL THOUGHTS

Check Point's  Harmony customers with activated Threat Emulation are safeguarded
against these types of attacks. This is just one example of how our Threat
Emulation 'Deep PDF' can detect and prevent phishing campaigns through
structural analysis, URLs, and other metadata, without relying on static
signatures or manual assistance. By integrating 'Deep PDF' into our Threat
Emulation product suite, we provide an additional layer of digital protection
against cyber threats.

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 * Reviewed June 11, 2023
   
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