PDF malware analysis — malicious · f708a23eb645e902

MALICIOUS

PDF

6.6 KB

MD5: ee09f130fc8f9254cb5d412e227c1801 SHA-1: 0d24fd3eb0adc3816f785058bd6c70bd457814c6 SHA-256: f708a23eb645e9025b298665a825d1f412a948d2e8bb6e31fb3526ddc965dfa4

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, flagged by multiple heuristics as malicious. The JavaScript stream is obfuscated and appears to be a stager, likely intended to download and execute a second-stage payload. The document body contains seemingly random text, which is common in obfuscated malicious documents to evade simple content analysis.

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_obj0018_000.js` `64dbb1b26294330f72a9c5b7a7778b4e255c7b7609626eddfee2e06a530f4473`	pdf-javascript-stream	PDF /JS object 18 at offset 0x14F2	1021 bytes

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