sublimemediumRule

Attachment: PDF with suspicious document view lure

Detects PDF attachments containing a title box designed to lure recipients into viewing a document, a common social engineering technique used to direct users to malicious content.

MITRE ATT&CK

T1566.001 T1204.002 T1486 T1566 T1598

initial-access

Detection Query

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

Data Sources

Email MessagesEmail HeadersEmail Attachments

Platforms

Raw Content

name: "Attachment: PDF with suspicious document view lure"
description: "Detects PDF attachments containing a title box designed to lure recipients into viewing a document, a common social engineering technique used to direct users to malicious content."
type: "rule"
severity: "medium"
source: |
  type.inbound
  and any(filter(attachments, .file_type == "pdf"),
          any(file.explode(.),
              any(.scan.yara.matches, .name == "pdf_view_doc_here_title_box")
          )
  )
attack_types:
  - "Malware/Ransomware"
tactics_and_techniques:
  - "PDF"
  - "Social engineering"
detection_methods:
  - "Content analysis"
  - "File analysis"
  - "YARA"
id: "c9a7ca6f-7291-5788-ba55-a965316d4fee"