PDF malware analysis — malicious · 2bc05e665420f66a

MALICIOUS

PDF

4.4 KB Created: 2010-04-23 06:59:32 Authoring application: Dakmiyfomimaba

MD5: 3c045534ee04917e289115432f20f65f SHA-1: ac9fe6c786e2a904467c12554d5170d049c25d50 SHA-256: 2bc05e665420f66a1e688959f5bc7ec39380c91370400e9cb0fd9b49510315e4

116 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The critical ClamAV heuristic 'Pdf.Dropper.Agent-7243464-0' indicates this PDF is a known dropper. The presence of JavaScript actions and embedded JS streams, specifically a 'Page-word XOR JavaScript eval stager', strongly suggests the document is designed to execute malicious code. This stager likely decodes and runs JavaScript to download and execute a secondary payload, a common technique for PDF-based malware delivery.

Heuristics 4

ClamAV: Pdf.Dropper.Agent-7243464-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7243464-0
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` `77692aa6eee912f470430c71119e8b9c8ba346a577cd63ae147470c7ef4ca3c3`	pdf-javascript-stream	PDF /JS object 10 at offset 0xC9D	896 bytes

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