Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f8ecb5bd5a98b13…

MALICIOUS

PDF

93.5 KB
MD5: 96f38cbcfa4c55f8b64d61d060f0e6f0 SHA-1: cb76e021beaa9e572b66b37a829d49efb66cb371 SHA-256: 6f8ecb5bd5a98b134c0b3a473c36c9439efbcceecea6f998201936aba4ed4050
168 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains an embedded XFA form and a script payload, flagged by multiple heuristics and ClamAV as malicious. The embedded script, identified as JavaScript, is designed to execute malicious code, likely to download and run a secondary payload. The specific exploit and payload are not fully discernible due to obfuscation, but the overall pattern suggests an exploit targeting PDF viewers.

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
2f29251ee3f4ea29852743b6c62ca5faec0de191b3c3a3138b0c3b0ef33c0d7a		 pdf-embedded-script PDF raw stream script payload at offset 0x246 94992 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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