Malicious PDF — malware analysis report

Static analysis result for SHA-256 36501de03d2f6c06…

MALICIOUS

PDF

42.8 KB
MD5: 1109b03a5186c50ae75af25f232cc90e SHA-1: aab95e7f39da4320bb85c12ba9279c923bf7ab8b SHA-256: 36501de03d2f6c06110733b765ced7761f9177dada9ccfa1d0afbfd05d0b1964
186 Risk Score

Malware Insights

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

The PDF file contains embedded script content and was flagged by multiple heuristics, including ML classifiers and ClamAV, indicating malicious intent. The presence of embedded script payloads and the ML_NYX_PDF_MALICIOUS firing strongly suggest the file is designed to exploit PDF vulnerabilities. The embedded script, though obfuscated, likely contributes to the delivery of a second-stage 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
de1625f49cd217ead227f3b809c2e4d131412373696405268a54573dc2e0f042		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 43053 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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