Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5e8c7469bf71880…

MALICIOUS

PDF

82.6 KB
MD5: c672cffdc7f42a3a341144a692f9ecaa SHA-1: 4877411786ea98c0e717e2e44c4a11dd767eb1e9 SHA-256: a5e8c7469bf718800f90b502b1779c4bf8b43875ae9e00aa503ec17717f32453
178 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file exhibits multiple high-severity heuristic firings, including an embedded script payload and a critical ClamAV detection for 'Pdf.Exploit.Agent-6136306-0'. The presence of XFA form elements further indicates a complex structure often used for exploitation. The embedded script, though not directly readable, is flagged as malicious and likely responsible for delivering the exploit payload, contributing to the overall malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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.
  • 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_pdf_script_00000246.bin
26e270c15df002d83ef8878c9edee1df30acf47fedb70a2f8940ab931fbf115a		 pdf-embedded-script PDF raw stream script payload at offset 0x246 83833 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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