PDF malware analysis — malicious · 14470aa1cde989c1

MALICIOUS

PDF

6.3 KB Authoring application: Woibneqeni (via 0e183Uzenwzijecijawida)

MD5: 4dc02d53ce696dc29b29f9b5c916dea6 SHA-1: baa0f1c70d29369259966a5b85e2461f2ea8dca2 SHA-256: 14470aa1cde989c1b18d86fd92a2ec6649c2d5a21bbe6e7282bc4bb214ec18e5

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript that is obfuscated but appears to be a stager. The script reconstructs hexadecimal byte values and evaluates them, likely to download and execute a second-stage payload. The reconstructed bytes form the string '0x560x650x6c0x660x6f0x720x6d0x610x640x650x720x2e0x650x780x650x0a', which decodes to 'loader.exe\n'. This indicates the PDF's purpose is to act as a malicious attachment, likely delivered via spearphishing, to initiate further infection.

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_obj0010_000.js` `e5fb7241b86520d30618ed164f0373984e043b354e933bd4bfa81c848e06fafc`	pdf-javascript-stream	PDF /JS object 10 at offset 0x11B0	1464 bytes

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