Malicious PDF — malware analysis report

Static analysis result for SHA-256 87a57514c53371fc…

MALICIOUS

PDF

93.4 KB
MD5: 1c70a68f8deec1d8bfab0fb0175c8dc7 SHA-1: 025ee937347775844dc5ea1c9ebd7f419ef0743c SHA-256: 87a57514c53371fc4357e6dd1895546ca3d39f5ea1eb27673146b73280b9247f
178 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious PDF

The PDF utilizes XFA forms and contains an embedded script payload, strongly indicating malicious intent. ClamAV detections for 'Pdf.Exploit.Agent-6136306-0' and on an extracted artifact ('Pdf.Exploit.Agent-36769') confirm its malicious nature. The ML classifier also flagged it with high confidence. The embedded script is likely responsible for executing the exploit.

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
9dbcb837664a9ce0f7f0d3da5fdb927ebaaf690a259928aa8eae331c38811743		 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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