Malicious PDF — malware analysis report

Static analysis result for SHA-256 235a4b5254e7bea2…

MALICIOUS

PDF

97.1 KB
MD5: c35762238121d6cff37f7fff6d6536ca SHA-1: 9e79f372775bb9b0cd6ef686772c882504727e27 SHA-256: 235a4b5254e7bea2eaab55ccdf5ae195c2faf71c60d75ee58fe0a75e1f75c113
118 Risk Score

Malware Insights

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

The PDF file contains an embedded script payload and utilizes XFA forms, both flagged as malicious. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded script is likely responsible for executing the exploit, leading to the overall malicious behavior of the document. While specific IOCs are limited to URLs, the presence of these elements points to a common PDF-based exploit delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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_0000026c.bin
bb2528e8b3da3d45430134806b2ce5eab4be0b6c0ad9299e8ad07518736fa44c
pdf-embedded-script PDF raw stream script payload at offset 0x26C 98659 bytes