Malicious PDF — malware analysis report

Static analysis result for SHA-256 80f3f79c32bab5ec…

MALICIOUS

PDF

79.4 KB
MD5: 34d35b020f3185f973130d62faed6e39 SHA-1: cf2b54668a27b8c3b621462d1175df94d1714cd9 SHA-256: 80f3f79c32bab5ecacb6a14f7bbc8f3d4786f1149e18f6c08575402b3621f43f
108 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and a machine learning classifier, with heuristics indicating an XFA form and an embedded script payload. The embedded JavaScript, though obfuscated, appears to be designed to download and execute a secondary payload. The benign URLs present are likely decoys or standard XFA schema references.

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
b6b56e5f6f18649b468a102c981f785f58ce66ab0abe344bd54bb9db85b9d7c1
pdf-embedded-script PDF raw stream script payload at offset 0x23C 80622 bytes