sublimemediumRule

Attachment: PDF with blurry lure image

Detects PDF attachments containing a blurry image used in credential phishing lures.

MITRE ATT&CK

Detection Query

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

Data Sources

Email MessagesEmail HeadersEmail Attachments

Platforms

Raw Content

name: "Attachment: PDF with blurry lure image"
description: "Detects PDF attachments containing a blurry image used in credential phishing lures."
type: "rule"
severity: "medium"
source: |
  type.inbound
  and any(filter(attachments, .file_type == "pdf"),
          any(file.explode(.),
              any(.scan.yara.matches, .name in ("pdf_lure_image_blurry", ))
          )
  )
attack_types:
  - "Credential Phishing"
tactics_and_techniques:
  - "PDF"
detection_methods:
  - "File analysis"
  - "YARA"
id: "5539a3fd-5821-5fd9-9119-7dd9e42cd739"