Malicious PDF — malware analysis report

Static analysis result for SHA-256 da462100ffec21f1…

MALICIOUS

PDF

42.6 KB
MD5: 9a0319302c0e54edc4b3be0e3b859568 SHA-1: 3730a62e4756d4c9f0c7f480232e1329a76784d7 SHA-256: da462100ffec21f174fdc6aa6a25b7f347bcf3be747579261e56de61e214d73e
186 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Exploit.Agent-36830, indicating it contains an exploit. Heuristics confirm the presence of an embedded script payload and an embedded file, both common delivery mechanisms for exploits. The ML classifier also strongly indicates maliciousness. While the embedded script is obfuscated, the overall indicators point to a malicious PDF designed to exploit vulnerabilities and deliver a secondary payload.

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
72ea9291d70a13931bb5ed85c99584a4db80260ec177e647ec2d313afb58e3eb		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42881 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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