Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3dae67b7463e91b…

MALICIOUS

PDF

93.4 KB
MD5: 09aeac2ce39a60aa3506eeeabf1c6803 SHA-1: 8df011d1ac0f1350ae026787751ba7565a046b34 SHA-256: c3dae67b7463e91bf3ddceeabadf52197b721a9938ee60196284dfe15466a68e
178 Risk Score

Malware Insights

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

The PDF file utilizes XFA forms and contains an embedded script payload, as indicated by multiple heuristic firings including critical ClamAV detections. The ML classifier also strongly flagged this PDF as malicious. While the exact script functionality is not detailed, the presence of an embedded script payload within an XFA PDF commonly indicates an attempt to download and execute a secondary malicious payload.

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
f06c0dc923825dfd504da071d3885a7b94e1942d992e75f46a8917d21da74aeb		 pdf-embedded-script PDF raw stream script payload at offset 0x246 94922 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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