Malicious PDF — malware analysis report

Static analysis result for SHA-256 18505d1229eb0acd…

MALICIOUS

PDF

4.5 KB Authoring application: Vabameuaki
MD5: 3daa74b66a54a19129b621cad569ea18 SHA-1: b997f569323036a36dcad26fae2bf161f8ea6a17 SHA-256: 18505d1229eb0acdde09fd87398b83c32f2d7853fa2b5e56f3f710a83dd4a851
86 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • Page-word XOR JavaScript eval stager high PDF_PAGE_WORD_XOR_EVAL_STAGER
    PDF JavaScript enumerates rendered page words with getPageNthWord/getPageNumWords, extracts encoded byte fragments, XOR-decodes the stage with char-code helpers, and evals the result. This is an old exploit-kit staging pattern and is not normal document JavaScript.
  • 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.
  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0011_000.js
1ec398366107a5fedd9bcf18a57f32d68d58e87986c8ad1c876f457b209e2152		 pdf-javascript-stream PDF /JS object 11 at offset 0xCA2 815 bytes

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