sublimehighRule

Attachment: PDF with CVE-2026-34621 lures

Detects PDF attachments containing YARA signatures associated with CVE-2026-34621's observed lures.

MITRE ATT&CK

Detection Query

type.inbound
and any(filter(attachments, .file_type == "pdf"),
        any(file.explode(.),
            .depth == 0
            and any(.scan.yara.matches,
                    .name == "pdf_cve_2026_34621_observed_lures"
            )
        )
)

Data Sources

Email MessagesEmail HeadersEmail Attachments

Platforms

Raw Content

name: "Attachment: PDF with CVE-2026-34621 lures"
description: "Detects PDF attachments containing YARA signatures associated with CVE-2026-34621's observed lures."
type: "rule"
severity: "high"
source: |
  type.inbound
  and any(filter(attachments, .file_type == "pdf"),
          any(file.explode(.),
              .depth == 0
              and any(.scan.yara.matches,
                      .name == "pdf_cve_2026_34621_observed_lures"
              )
          )
  )
attack_types:
  - "Malware/Ransomware"
tactics_and_techniques:
  - "PDF"
detection_methods:
  - "File analysis"
  - "YARA"
id: "181ac54e-91c7-5521-ac81-a65ebe50f50a"