Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3eca8087d09c458…

MALICIOUS

PDF

97.1 KB
MD5: 25269f49be1f96087e68d2c54fee95b4 SHA-1: 82cf46d5783c244f5dbc2603e469368bda633156 SHA-256: b3eca8087d09c458524079def69c01243af4a8f638160a702fde8684f24f05ca
120 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious PDF T1566.002 Phishing: Spearphishing Attachment

The file is identified as a malicious PDF by multiple high-confidence heuristics, including ML classification and ClamAV detection. The presence of an XFA form and an embedded script payload indicates an attempt to exploit PDF vulnerabilities. The embedded script is likely responsible for downloading and executing a second-stage payload, although its exact functionality is obscured by the PDF structure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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_0000026c.bin
381d07b6dc4eabb0d8ebd3a366d7fbc98594606e41e08b769d537de25fed1b55		 pdf-embedded-script PDF raw stream script payload at offset 0x26C 98759 bytes

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