PDF malware analysis — malicious · 6f9e1ad1a074a894

MALICIOUS

PDF

5.6 KB Authoring application: Jidagelageno (via 12df2Ylojoppekaxopqi)

MD5: 53c5c6d227917492114d9cd1c92fe422 SHA-1: 4882082e928608129498c21146b0a5c205fdbebb SHA-256: 6f9e1ad1a074a894e613212b6c3025197a3cf15dc304bc2988aa92d02d6a6adc

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

This PDF file contains obfuscated JavaScript that uses an eval stager. The script attempts to deobfuscate and execute code, likely to download and run a second-stage payload. The specific deobfuscation routine is complex and heavily obfuscated, making it difficult to determine the exact payload or destination without further dynamic 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_obj0008_000.js` `c510f8c6a5031d17c6606a6a4e88ede1c3452bf51c2d06efb7ba03d3692fec56`	pdf-javascript-stream	PDF /JS object 8 at offset 0xF52	1346 bytes

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