Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eb5b9493c0d90f0…

MALICIOUS

PDF

79.4 KB
MD5: 120af5c9f549793207b7a7908c5d9897 SHA-1: 52be611c03b3bd6b4d0d8b95d8dffdbc1e91b7ee SHA-256: 5eb5b9493c0d90f05afefb5f6c06b48dcc9cdce3d73f97855a807ffa4b9353be
108 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. The presence of an XFA form and embedded JavaScript points to exploitation of client-side vulnerabilities. The JavaScript appears to be obfuscated but is designed to execute, likely downloading a further stage. The benign URLs extracted are likely unrelated to the malicious functionality.

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
  • 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_0000023c.bin
c1e227e4d27012b04d229e239a1653b6f7c31ba04e14f656a8ae482ab49ff392
pdf-embedded-script PDF raw stream script payload at offset 0x23C 80620 bytes