Malicious PDF — malware analysis report

Static analysis result for SHA-256 245ba46f0fd2f020…

MALICIOUS

PDF

79.3 KB
MD5: 22ca721ae9c1c987a66ab0bf3012b3b4 SHA-1: 831c9285c200267fc5f813e1361eb8d97cf8918f SHA-256: 245ba46f0fd2f020dd1f62e2e5409f38df4c291e6b0916bb66f3b4cd55b131d2
180 Risk Score

Malware Insights

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

The PDF was flagged by multiple high-severity heuristics, including ClamAV detections for 'Pdf.Exploit.Agent-6136306-0' and an extracted artifact 'Pdf.Exploit.Agent-36769'. The presence of an XFA form and an embedded script payload indicates a likely exploit attempt. The ML classifier also strongly indicated maliciousness. The embedded script is likely responsible for executing the 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_0000023e.bin
566dee47ad7bf024df4be12527e9c2479929cc019723105bc00807e82536ed51		 pdf-embedded-script PDF raw stream script payload at offset 0x23E 80467 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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