Malicious PDF — malware analysis report

Static analysis result for SHA-256 f23dc3d46651f250…

MALICIOUS

PDF

79.0 KB
MD5: 182c8b4dc641fe8de86b18d957d5cccd SHA-1: 3f3cd5e7da0f26d455645e9c65d8c2301dfde088 SHA-256: f23dc3d46651f25098df415675a2b354bd300467b1aa7133d22eeb35d3d83e46
178 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious Attachment T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file was flagged by multiple high-confidence heuristics, including ClamAV detection (Pdf.Exploit.Agent-6136306-0) and an ML classifier, indicating malicious intent. The presence of an XFA form and an embedded script payload suggests the document is designed to exploit vulnerabilities or execute malicious code upon opening. The embedded artifact 'embedded_pdf_script_0000023e.bin' is likely the delivered 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
e83d3db1b6abfca849f03d1ae8229b77cfe53f4dcac3c02ac0fe78fb3a161232		 pdf-embedded-script PDF raw stream script payload at offset 0x23E 80211 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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