PDF malware analysis — malicious · df85ff9aa62ecd0f

MALICIOUS

PDF

4.5 KB Authoring application: Vabameuaki

MD5: ed68daa07311cdf519d5516018bb7663 SHA-1: b423e7f0b473263f36ec9647156eac5aa7fb3a76 SHA-256: df85ff9aa62ecd0f58a0c79e0e041e534f76801f1dc86741f19a52b054ee912d

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, identified by heuristics as a page-word XOR JavaScript eval stager. This indicates the document is likely a dropper or downloader. The ML classifier strongly flagged this PDF as malicious. No specific family could be identified, but the presence of obfuscated JavaScript points to a malicious intent to execute further code.

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_obj0011_000.js` `1ec398366107a5fedd9bcf18a57f32d68d58e87986c8ad1c876f457b209e2152`	pdf-javascript-stream	PDF /JS object 11 at offset 0xCA2	815 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.