sublimemediumRule

Attachment: PDF RFP lure

Detects inbound messages with PDF attachments that match a YARA signature identifying RFP-themed lure documents with a specific black and white lure.

MITRE ATT&CK

T1566 T1566.001 T1566.002 T1598 T1534 T1656

initial-access

Detection Query

type.inbound
and any(filter(attachments, .file_type == "pdf"),
        any(file.explode(.),
            any(.scan.yara.matches, .name == "pdf_rfp_bw_lure")
        )
)

Data Sources

Email MessagesEmail HeadersEmail Attachments

Platforms

Raw Content

name: "Attachment: PDF RFP lure"
description: "Detects inbound messages with PDF attachments that match a YARA signature identifying RFP-themed lure documents with a specific black and white lure."
type: "rule"
severity: "medium"
source: |
  type.inbound
  and any(filter(attachments, .file_type == "pdf"),
          any(file.explode(.),
              any(.scan.yara.matches, .name == "pdf_rfp_bw_lure")
          )
  )
attack_types:
  - "Credential Phishing"
  - "BEC/Fraud"
tactics_and_techniques:
  - "PDF"
  - "Social engineering"
detection_methods:
  - "YARA"
  - "File analysis"
id: "fab3980f-0201-5ba0-9ac0-e1d0649b6c08"