Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd963cdef480098…

MALICIOUS

PDF

6.3 KB First seen: 2026-05-10
MD5: 26e157ac576e08d06a41e52663dbb8c6 SHA-1: e649295fc6a282a39c8d74e8200a5752a9de1078 SHA-256: 9dd963cdef480098ea4495c7b354fcd151c4ac7fbab9d7042f063347fcd12cf9
148 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded JavaScript with an eval() call, indicating an attempt to execute arbitrary code. This is a common technique for downloading and running second-stage malware. While the specific payload is not visible, the presence of JavaScript and the eval() function strongly suggests a malicious intent. No specific family could be identified.

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: cd33c4ae1dcc1484dbe60d6ed271140f5413c8cf303229d3c20c5b1025d70e1a

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