PDF malware analysis — malicious · 71ab9c13b6bb52c5

MALICIOUS

PDF

5.6 KB Authoring application: Jidagelageno (via 441e3Ylojoppekaxopqi)

MD5: af239c020df9cab8e66bc213487c8c80 SHA-1: ed3d47d202d84e60186f42157bd0265974529eef SHA-256: 71ab9c13b6bb52c582219c9f945e1894e455baeeb9142d80b3b114fc71aa19cc

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript that is heavily obfuscated. The script appears to be a stager designed to deobfuscate and execute a second-stage payload, likely by evaluating a constructed string. The presence of PDF-specific heuristics like 'PDF_PAGE_WORD_XOR_EVAL_STAGER' and 'PDF_JAVASCRIPT' strongly indicates malicious intent, pointing towards a common phishing or malware delivery technique.

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

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