Malicious PDF — malware analysis report

Static analysis result for SHA-256 411ea74ca7d33db4…

MALICIOUS

PDF

8.1 KB
MD5: a1f5e22667d1ab1978feb128377dae4a SHA-1: f4358043b9a163be35a0ab0eba79670218f36abe SHA-256: 411ea74ca7d33db4ac7383eacb411ee1fb9899b4e108188bbe6e2619ac8a8d7e
86 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The ML classifier also flagged the PDF as malicious with a high score. The presence of an eval() call suggests the execution of arbitrary code. While no specific URLs or further script content were extracted, the overall pattern points to a malicious PDF designed to exploit vulnerabilities and execute code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9224

Heuristics 4

  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
  • JavaScript action low 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)
  • 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#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/pdf/1.3/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objstm_0024_00.bin
64d31ee0bbda581dee1303a32fe5211744a2088944541e3dfa1af3c9f3aa6d3a		 pdf-objstm-decoded PDF /ObjStm 24 0 obj (inflated) 380 bytes

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