PDF malware analysis — malicious · 3dad2f355fcaaa54

MALICIOUS

PDF

5.6 KB Authoring application: Jidagelageno (via 7447eYlojoppekaxopqi)

MD5: 2a67634c14ad5b453fad80a0c2abc801 SHA-1: 873cd4c54c7fe4d14b1d48dfa3923827c22ac032 SHA-256: 3dad2f355fcaaa54639110ac438498149f85496799e0510c6120244ed8a7ef13

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, identified by multiple heuristics including 'PDF_JAVASCRIPT', 'PDF_JS', and 'PDF_PAGE_WORD_XOR_EVAL_STAGER'. The ML classifier also flagged it as malicious with high confidence. The embedded JavaScript stream is the primary mechanism for executing the malicious payload, likely downloading and executing a second-stage exploit or malware. The document body is heavily obfuscated and unreadable, providing no direct clues to the lure.

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.

Filename	Kind	Source	Size
`javascript_obj0008_000.js` `c510f8c6a5031d17c6606a6a4e88ede1c3452bf51c2d06efb7ba03d3692fec56`	pdf-javascript-stream	PDF /JS object 8 at offset 0xF52	1346 bytes

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