PDF malware analysis — malicious · f7e37448e3c1454f

MALICIOUS

PDF

4.6 KB Created: 2010-04-30 20:47:26 Authoring application: Fodebarexa

MD5: 02a842220b5fe5dc4fbb8bb525d8884c SHA-1: 27c08d1d94e499b6b321d5cbe261d0d80a47088d SHA-256: f7e37448e3c1454f1c2165d5c8635a2ca661214dda276e717d2828fd36828610

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, identified by heuristics as a 'Page-word XOR JavaScript eval stager'. This stager is designed to execute arbitrary code, strongly suggesting it acts as a downloader for further malicious content. The ClamAV detection of 'Pdf.Dropper.Agent-7325550-0' further confirms its malicious dropper functionality.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

ClamAV: Pdf.Dropper.Agent-7325550-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7325550-0
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` `7ad1ee8cba7784f1a95b635244a4165fad123a151fe73c8fc9a0d61755caba74`	pdf-javascript-stream	PDF /JS object 10 at offset 0xCAB	874 bytes

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