Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4eefd8f2a8c255b…

MALICIOUS

PDF

97.4 KB
MD5: aa983ecaa638a39e3606d7542c946b40 SHA-1: 28c44067854e88c3093246ecfe9ef298d225e44d SHA-256: f4eefd8f2a8c255b7646b2428a9dab6839e22eb38df791da5e12d0f2208f3245
118 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by multiple high-confidence heuristics, including ML and ClamAV, indicating malicious intent. The presence of an XFA form and an embedded script payload suggests the document is designed to exploit vulnerabilities or execute arbitrary code. The embedded script likely downloads and executes a second-stage payload, contributing to the overall malicious nature of the document.

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
8e69cd6a7c8f25708823936d4b9719e8237b94b9b4438a6a68b50d2e9a1413da
pdf-embedded-script PDF raw stream script payload at offset 0x26C 98981 bytes