Malicious PDF — malware analysis report

Static analysis result for SHA-256 29303fef00149222…

MALICIOUS

PDF

42.2 KB
MD5: 0683fbaa693b078f7d42d5927e385bc8 SHA-1: 79d9194a9de05cde5a1787ab1b6f5eef4518a16d SHA-256: 29303fef00149222f4cb00a4810bb62c220b17953febb4516d5deb90cda2f2f7
186 Risk Score

Malware Insights

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

The PDF file contains an embedded script payload and was flagged by multiple heuristics, including ML and ClamAV, as malicious. The ML classifier output of 0.999995 strongly indicates malicious intent. The embedded script is likely responsible for exploiting a PDF vulnerability to download and execute 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
3d10e1af19b5e0f097f8dc1994b8dfb6fea7adb83599658b292cee09e362b43b		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42419 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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