Attachment: PDF USDOC ITA signature lure

calendar Oct 19, 2026  ยท
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Flags inbound messages containing PDF attachments that match a YARA rule looking for signature overlaps in observed USDOC ITA lures.

Sublime rule (View on GitHub)

 1name: "Attachment: PDF USDOC ITA signature lure"
 2description: "Flags inbound messages containing PDF attachments that match a YARA rule looking for signature overlaps in observed USDOC ITA lures."
 3type: "rule"
 4severity: "medium"
 5source: |
 6  type.inbound
 7  and any(filter(attachments, .file_type == "pdf"),
 8          any(file.explode(.),
 9              any(.scan.yara.matches, .name == "pdf_ITA_signature_lure")
10          )
11  )  
12attack_types:
13  - "Credential Phishing"
14  - "Malware/Ransomware"
15tactics_and_techniques:
16  - "PDF"
17detection_methods:
18  - "File analysis"
19  - "YARA"
20id: "8fd9d168-e318-5067-91af-55d68d9a1d88"
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