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Rising Threat of Weaponized PDFs in Cyberattacks

Rising Threat of Weaponized PDFs in Cyberattacks

First seen 27 Oct 2026, 02:13 UTC • •
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ThreatCluster AI
ThreatCluster •October 27, 2026 at 10:43 UTC
  • •22% of malicious email attachments are PDFs, making them a significant threat.
  • •Over 400 billion PDFs were opened last year, increasing the attack surface.
  • •Enhanced security controls are essential for processing untrusted PDFs in .NET applications.

Check Point's 2025 research reveals that PDFs constitute 22% of all malicious email attachments, highlighting their role as a primary vector for cyberattacks. With over 400 billion PDFs opened last year, attackers exploit the complexity of the format to embed malicious code. The research indicates that 68% of cyberattacks originate from email, with PDFs becoming increasingly favored due to their high success rate in bypassing traditional security measures. The report emphasizes the need for enhanced security controls when processing untrusted PDFs, particularly in .NET applications, where the risk of exploitation is significant. Developers are urged to implement strict isolation measures and utilize OCR technology to mitigate risks associated with PDF processing.

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Timeline

2025-01-01
Check Point Research published findings
Research revealed that 22% of malicious email attachments are PDFs, emphasizing their role in cyberattacks.
blog.checkpoint.com
2026-10-26
Cyberkendra article on PDF security controls
Article discusses seven security controls for processing untrusted PDFs in .NET applications to mitigate risks.
Cyberkendra

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Extracted Entities (11)

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Common questions

What percentage of attacks involve PDFs?
22% of all malicious email attachments are PDFs, according to Check Point's research.
What security measures should be implemented?
Implement strict isolation for PDF processing and use OCR to extract text safely.
Are there known vulnerabilities related to PDFs?
The articles do not specify any current vulnerabilities, but highlight the need for robust security controls.