Malicious PDF — malware analysis report

Static analysis result for SHA-256 1408a3c32097a594…

MALICIOUS

PDF

42.4 KB
MD5: 16586a5015d5a331e3b0496468f6025d SHA-1: e2d1363a3817b1c389aa622bfb40dba850a3b5c1 SHA-256: 1408a3c32097a594df473442e3bdb47c64eccebfaeba8e522d67603ddc2f3a49
176 Risk Score

Malware Insights

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

The file is a PDF identified as malicious by ML classifiers and ClamAV with the signature Pdf.Exploit.Agent-36830. It contains embedded scripts and an embedded file, indicating it's designed to exploit vulnerabilities and execute arbitrary code. The embedded JavaScript, though obfuscated, is likely responsible for triggering the exploit and downloading 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 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
91d45b4df7d41bef7843754cc28707c35cf7b6287496ba2cbac322ff3c9db3bb		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42628 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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