PDF malware analysis — malicious · 07dd91f95a321539

MALICIOUS

PDF

5.6 KB Authoring application: Jidagelageno (via 07b59Ylojoppekaxopqi)

MD5: cb924d27868bdb9f261a51b115e45678 SHA-1: 1fda0299bdf4286ca72e9610432c72beb9afaa8d SHA-256: 07dd91f95a321539766d48b8b9466db6d72b25b5cd0da17fee2cdcc87ad9a7ab

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file contains obfuscated JavaScript, identified by heuristics as a stager. This script attempts to deobfuscate and execute code, likely to download and run a second-stage payload. The presence of JavaScript and the stager behavior strongly suggest a malicious intent, commonly seen in phishing documents.

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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