Malicious PDF — malware analysis report

Static analysis result for SHA-256 659251d2f50c1dd7…

MALICIOUS

PDF

100.5 KB
MD5: a92614b020772a2a93ed068704a0e52b SHA-1: 22769c05d20cd822354138741beec14dfe7329bf SHA-256: 659251d2f50c1dd7558c3b25846876e10a63b040a210f75264bd86528fa6764e
108 Risk Score

Malware Insights

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

The sample is a PDF file flagged as malicious by ClamAV and an ML classifier, containing embedded JavaScript. The script appears to be obfuscated but is designed to execute, likely to download and run a second-stage payload. The presence of XFA form elements and embedded scripts points to 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
5b57b62c144b9ccf12065d510441bb02e11894e9a30fd79c34a2d32f83949aae		 pdf-embedded-script PDF raw stream script payload at offset 0x246 102152 bytes

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