Malicious PDF — malware analysis report

Static analysis result for SHA-256 96da7d477625cc4c…

MALICIOUS

PDF

42.5 KB
MD5: 0f55d6be49a05bd8afed247e071785a1 SHA-1: f6584599fb244f31fad454ea6b3b0d5f11c0581d SHA-256: 96da7d477625cc4c253d11d16403aff4e13e51f62a80412446ee49b0a2df8ee1
186 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by multiple engines, including ClamAV, and a machine learning classifier. Heuristics indicate the presence of an embedded script payload and an embedded file, suggesting it's designed to exploit vulnerabilities. The embedded script, though obfuscated, appears to be involved in the payload delivery mechanism.

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
54b0abb41ebae5f684047f819205a6401a03deb8695687a1c1983a34d39e2a62		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42791 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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