Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dc4f2c032e5a938…

MALICIOUS

PDF

93.7 KB
MD5: e34f1bba4e09b0cc3235fc2e1a477e5e SHA-1: 390ebcb98e038c99fd14b1dd646033cff05ecfb5 SHA-256: 4dc4f2c032e5a9389f10399fa7377ad705f0b804448ec2c7fe3995fe942d4fc6
180 Risk Score

Malware Insights

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

The PDF file contains an embedded script payload and utilizes XFA forms, both flagged as malicious by heuristics. ClamAV detections indicate it is a known exploit, likely Pdf.Exploit.Agent. The embedded script is the primary mechanism for delivering the malicious payload, though its exact function is obscured by the PDF structure. The confidence is high due to multiple critical detections.

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
9bc09482bb58c21957051dce89a75e511e6ae0c3b24bf7ab815432218ba57299		 pdf-embedded-script PDF raw stream script payload at offset 0x246 95232 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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