Malicious PDF — malware analysis report

Static analysis result for SHA-256 1adac8ba40e1325a…

MALICIOUS

PDF

79.4 KB
MD5: d5bff180838cd4ae4c49084455f0dac1 SHA-1: 5c5cf9c7980b210536c98ef67bd896ccb6674ace SHA-256: 1adac8ba40e1325acff8a7c6cb06e228df32fa5ed0001df76a5907b8b7c6ddc1
118 Risk Score

Malware Insights

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

The PDF was flagged by multiple high-confidence heuristics, including ML classification and ClamAV detection, indicating it contains an exploit. The presence of an XFA form and an embedded script payload strongly suggests it's designed to execute malicious code. The embedded script is likely responsible for downloading and executing a second-stage payload, though 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_0000023c.bin
2757aab065db00839d44c6b1885f787a540800c8f595837d37141b9a145b53de		 pdf-embedded-script PDF raw stream script payload at offset 0x23C 80624 bytes

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