Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d3454e8a4afe0ab…

MALICIOUS

PDF

93.3 KB
MD5: b8aadd4a1442055a6d7834b6313cd700 SHA-1: 36c30ec372001d6940238250c923f9f94eaf7fe3 SHA-256: 3d3454e8a4afe0abb92abcf92e9aed54e9f06b001b9f7904ba18f4852c29c5fe
178 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF utilizes XFA forms, a known vector for exploitation. High-confidence heuristics and ClamAV detections indicate malicious intent, specifically targeting PDF exploits. An embedded script payload was also identified, suggesting the PDF is designed to download and execute a secondary malicious component.

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
346bcd98c53cbca001b606f6ca879f816c1d296c2966adcdc0ef74ceb96f015f		 pdf-embedded-script PDF raw stream script payload at offset 0x246 94820 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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