sublimehighRule

Attachment: PDF With SAI Global ISO9001 Logo

Detects PDF attachments containing embedded SAI Global ISO9001 logos, which may indicate brand impersonation or fraudulent certification claims.

MITRE ATT&CK

T1566 T1566.001 T1566.002 T1598 T1598.003

initial-access

Detection Query

type.inbound
and any(filter(attachments, .file_type == "pdf"),
        any(file.explode(.),
            any(.scan.yara.matches,
                // yara rule matches on an embedded SAI Global logo that allows for resized versions of the image
                .name == "SAI_Global_ISO9001_Logo_PDF_Fuzzy"
            )
        )
)

Data Sources

Email MessagesEmail HeadersEmail Attachments

Platforms

Raw Content

name: "Attachment: PDF With SAI Global ISO9001 Logo"
description: "Detects PDF attachments containing embedded SAI Global ISO9001 logos, which may indicate brand impersonation or fraudulent certification claims."
type: "rule"
severity: "high"
source: |
  type.inbound
  and any(filter(attachments, .file_type == "pdf"),
          any(file.explode(.),
              any(.scan.yara.matches,
                  // yara rule matches on an embedded SAI Global logo that allows for resized versions of the image
                  .name == "SAI_Global_ISO9001_Logo_PDF_Fuzzy"
              )
          )
  )

attack_types:
  - "Credential Phishing"
tactics_and_techniques:
  - "Impersonation: Brand"
  - "PDF"
detection_methods:
  - "File analysis"
  - "YARA"
id: "3e3e1af4-48ee-5ddf-8051-a1c68c4451ef"