Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f46a56393af92cd…

MALICIOUS

PDF

100.7 KB
MD5: a612ab308327b0f52edaae542d2d29ce SHA-1: c0a8716e158da0c36f7848bd0c69acf3ac41b08a SHA-256: 5f46a56393af92cd6a89c1d30e3143cbaac8027e2aad4bf88ccd8f2cf222495a
108 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. The script appears to be heavily obfuscated but is designed to execute, likely downloading and running a second-stage payload. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with an exploit targeting PDF viewers.

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_00000246.bin
23029dd74c5cca8990e69cbc467a8ee9fceacbd6fd7a375a5177e12148218cc1
pdf-embedded-script PDF raw stream script payload at offset 0x246 102347 bytes