Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ed991ae48e6bc3e…

MALICIOUS

PDF

93.4 KB
MD5: 2fec413f09c44b8f06af2a68325a732e SHA-1: 0bbc29ba879f250f87bdd0e00fc900f7afd49b51 SHA-256: 3ed991ae48e6bc3e075097617e3d2c58e7e893918a4001ea790a3192e056121d
178 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file was flagged as malicious by multiple engines, including ClamAV, and exhibits characteristics of XFA form exploitation. An embedded script payload was detected, strongly suggesting it is used to deliver a secondary stage. The ML classifier also returned a very high probability of maliciousness.

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
b3af7acf737cf738393a482d2718a4d707e908f7c8040763adcc7f7a6ad11199		 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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