Malicious PDF — malware analysis report

Static analysis result for SHA-256 21386743e8155fd6…

MALICIOUS

PDF

42.6 KB
MD5: 86cb9b7a2151e823f29ab8d7cb855b82 SHA-1: 5eac0cf49d522b6cb2b55288bf2e62f8710131cd SHA-256: 21386743e8155fd6d8f76168cce03b5ea15e5cb0908cdddc61911119bafeb1d4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution

The PDF file contains embedded content and triggers heuristics related to embedded script payloads and exploit detection, including a critical ClamAV detection for 'Pdf.Exploit.Agent-36830'. This indicates the file is designed to exploit a vulnerability within PDF viewers to execute a malicious payload. The embedded artifact and script markers strongly suggest a delivery mechanism for further malicious activity.

Heuristics 6

  • ClamAV: Pdf.Exploit.Agent-36830 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36830
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
b2f7f7594ff317f359ee05af67dab57f6b4a06dbfa584374990ec6ba80183453		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42839 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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