Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f2845f002c5199…

MALICIOUS

PDF

94.1 KB
MD5: 4396c6864fdf8685634be825ce84f8ea SHA-1: 7b850af936f3d53d0f73eeada23625b6d05971a8 SHA-256: 67f2845f002c519969c6f65881349e18c5d6a6e13dbdd073c3103d10037d844b
168 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF containing an embedded JavaScript payload, flagged by multiple heuristics and ClamAV as malicious. The script appears to be obfuscated but is designed to execute, likely to download and run a secondary payload. The benign URLs present are part of the XFA form specification and do not indicate malicious activity.

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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded script payload in PDF stream low 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.
  • 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
417a13aa6fce9689cce7b586b731ffa02fbf9507777b8bf13700eccc423513e2		 pdf-embedded-script PDF raw stream script payload at offset 0x246 95636 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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