PDF malware analysis — malicious · 108a6f2510c21e3d

MALICIOUS

PDF

4.5 KB Authoring application: Vabameuaki

MD5: 1ea55423908c44b9cf79bfda6a7b42d6 SHA-1: 6ea9a5b58662be7764f04a3240be2d32b9effd9a SHA-256: 108a6f2510c21e3d520e79091a8df201aff8a50109289fdbc5552602a4639ce0

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript that is obfuscated using XOR and string concatenation. The script reconstructs the string "unescape" and then uses it to deobfuscate a payload. This payload is then executed, indicating the document's primary purpose is to launch malicious code, likely a downloader or exploit.

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.