PDF malware analysis — malicious · 7beab320122cac1e

MALICIOUS

PDF

4.5 KB Authoring application: Vabameuaki

MD5: e6d2636962b9585489f879e376f888cb SHA-1: 4d0befde5c3a99ae69a179bac5bd9a9c09967549 SHA-256: 7beab320122cac1e41fd178e81ecf176578863fa851a2f21b259821f75b4fbaa

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains embedded JavaScript, flagged by high-severity heuristics as a stager. The ML classifier strongly indicates maliciousness. The JavaScript stream, named 'javascript_obj0011_000.js', is likely responsible for downloading and executing a second-stage payload, which is a common technique for initial access and further infection. The authoring application 'Vabameuaki' and the generic nature of the embedded content suggest a downloader rather than a targeted attack.

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

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