Malicious PDF — malware analysis report

Static analysis result for SHA-256 336747a29a3b203f…

MALICIOUS

PDF

6.3 KB First seen: 2026-05-11
MD5: b32f623314533dcf12d47c0ad5ded66d SHA-1: 1668615ae6112b17b0a24cab46ba6535cc746328 SHA-256: 336747a29a3b203f2e82a59ef91e13617cf2454d8c01a785ef9bad534bd8a566
148 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded JavaScript with high-confidence heuristic firings for PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL, indicating the presence of executable code. The eval() call suggests an attempt to dynamically execute obfuscated JavaScript, likely to download and run a second-stage payload. No specific family could be identified due to the generic nature of the obfuscation and lack of further indicators.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 4

  • JavaScript action low 2 related findings PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules. (matched inside decoded stream)
  • PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER
    PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
    Matched line in script
    eval(itkuy8);
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules. (matched inside decoded stream)
  • 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://www.w3.org/1999/02/22-rdf-syntax-ns# In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objstm_0024_00.bin pdf-objstm-decoded PDF /ObjStm 24 0 obj (inflated) 385 bytes
SHA-256: bb2a2f23a305729e9d3e66a3e2162513d973f0743dd2535b962fc5a273a7c672

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