Malicious PDF — malware analysis report

Static analysis result for SHA-256 14cc0c188e5f7f41…

MALICIOUS

PDF

79.4 KB
MD5: 5a221445248e997cf44c938918a11ccb SHA-1: a50c16620e803d71acb4a7941eef6d39e61a1315 SHA-256: 14cc0c188e5f7f412e344d9acdb6d0eb197845f981134cfb9365b6a2413523e8
168 Risk Score

Malware Insights

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

The PDF utilizes XFA (XML Forms Architecture) and contains an embedded JavaScript payload. This script is heavily obfuscated but appears designed to download and execute a second-stage payload. The ClamAV detection 'Pdf.Exploit.Agent-6136306-0' further confirms its malicious nature. The benign URLs present are likely decoys or standard XFA schema references.

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_0000023e.bin
03bbe22087c7a628f1cdb9fe345b3909173d57ef8013da93992b31f42a08fb10		 pdf-embedded-script PDF raw stream script payload at offset 0x23E 80555 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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