Malicious PDF — malware analysis report

Static analysis result for SHA-256 06211988e6b32591…

MALICIOUS

PDF

42.3 KB
MD5: b82f52154f8cb1756569f4e18d26f054 SHA-1: 635bc44e52ad11fda497221c0545060645bb955e SHA-256: 06211988e6b32591b08fc22dceef9d60eef5520ca6c41c9647d8406021c40391
176 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF was flagged by multiple heuristics, including ClamAV detection (Pdf.Exploit.Agent-36830) and an ML classifier, indicating it contains an exploit. An embedded script payload was identified, and while the document body is obfuscated, the presence of an embedded file and script suggests it's designed to execute malicious code, likely downloading a second-stage payload. The benign URLs present do not detract from the malicious indicators.

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 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 script payload in PDF stream low 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 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
1cce3f1d3c1ab0e3621ad1c19582d40fd738a29d9bdabcc8e55ff8ddd4a87400		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42548 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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