Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea9c997f29f09c08…

MALICIOUS

PDF

93.4 KB
MD5: dd4e07c986a89336f5a4e8f955c2cc73 SHA-1: 814d1a952192e42e80a87a5b9e44817f0811d004 SHA-256: ea9c997f29f09c08c30542d8c949ae339cab49c7cbfaddb381b6772eedef4745
178 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF utilizes XFA forms and contains an embedded script payload, strongly indicating malicious intent. ML classifiers and ClamAV detections confirm this, flagging it as a known exploit. The embedded script is likely responsible for downloading and executing a second-stage payload, though its exact functionality is obscured by obfuscation.

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
c6c0a50b685b07f5e2ccb1295d0b796940371eea5650ad021f22731d676bbcee		 pdf-embedded-script PDF raw stream script payload at offset 0x246 94922 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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