Attachment: PDF OneDrive blue lure

calendar Nov 3, 2026  ยท
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Detects inbound messages containing PDF attachments that match a YARA signature identifying a blue-themed OneDrive lure structure.

Sublime rule (View on GitHub)

 1name: "Attachment: PDF OneDrive blue lure"
 2description: "Detects inbound messages containing PDF attachments that match a YARA signature identifying a blue-themed OneDrive lure structure."
 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_blue_oneDrive_lure_structure")
10          )
11  )  
12attack_types:
13  - "Credential Phishing"
14tactics_and_techniques:
15  - "PDF"
16  - "Impersonation: Brand"
17  - "Social engineering"
18detection_methods:
19  - "File analysis"
20  - "YARA"
21id: "4ed638a9-4307-5f64-9890-32c17583379b"
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