Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cd09e17423f76b4…

MALICIOUS

PDF

42.8 KB
MD5: 2ad266d9ef0045daf0810a95cd80a67b SHA-1: a6d2bdc481c11c2eb8cdf7d340adc076a9ff7b91 SHA-256: 7cd09e17423f76b4012b1153ab9a9fc8b4947b9d78bf6938e1cc626b8968b963
188 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded script payloads and is flagged by multiple heuristics, including ClamAV detection for 'Pdf.Exploit.Agent-36830'. The ML classifier also strongly indicates maliciousness. While the document body is heavily obfuscated and difficult to interpret directly, the presence of embedded scripts and the nature of the heuristics suggest the PDF is intended to exploit vulnerabilities and likely download a secondary payload. No specific family could be confidently identified.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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
73241df813301407e6ee80d6dad954ee7b7d37b00f81dbcf6adbb06354db5234		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 43091 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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