Attachment: PDF object hash for callback phishing lures

calendar Nov 5, 2026  ยท
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Detects inbound messages containing PDF attachments that matches an object hash associated with call back phishing messages.

Sublime rule (View on GitHub)

 1name: "Attachment: PDF object hash for callback phishing lures"
 2description: "Detects inbound messages containing PDF attachments that matches an object hash associated with call back phishing messages."
 3type: "rule"
 4severity: "medium"
 5source: |
 6  type.inbound
 7  and any(filter(attachments, .file_type == "pdf"),
 8          any(file.explode(.),
 9              .scan.pdf_obj_hash.object_hash == "859af9926b356dd9b9df3b2c59a7bd16"
10          )
11  )  
12attack_types:
13  - "Callback Phishing"
14tactics_and_techniques:
15  - "PDF"
16detection_methods:
17  - "File analysis"
18id: "e72f7ca1-2391-570d-b36b-ffc2cfce8398"
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