Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc5aa39daeec2e83…

MALICIOUS

PDF

100.5 KB
MD5: a53ec37912a5f2876176a7651c884b20 SHA-1: 3fb5088ed74166e23da8c809be7e032de856ad11 SHA-256: dc5aa39daeec2e837daad86cd8c9c01113f737999774ddae4244ad1b40c948ad
118 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded script payload, indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. The XFA form structure suggests it may be leveraging XFA-specific vulnerabilities. The embedded script is likely responsible for executing the malicious payload, contributing to the overall attack.

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_00000246.bin
9d9498d5ffa3f0c5d29cc637840ac47a336e663329b85ef827f68e337b4a1bf8		 pdf-embedded-script PDF raw stream script payload at offset 0x246 102237 bytes

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