PDF malware analysis — malicious · 1ed1f2bd25e6d270

MALICIOUS

PDF

25.9 KB Created: 2011-72-51 03:25:00

MD5: dd394d7a25851d6b3e06b2ba6cd6801f SHA-1: 67ef6718a2855a477170bbd9afaf8522edba9e66 SHA-256: 1ed1f2bd25e6d270928dcb788b6550924b06c8510eb581f897aaa159fefc3eb0

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, flagged by multiple heuristics including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The ML classifier strongly indicates maliciousness. The JavaScript stream, named javascript_obj0001_000.js, is obfuscated and contains eval() calls, suggesting it's designed to download and execute a secondary payload. The primary attack pattern is therefore a malicious PDF dropper.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0001_000.js` `653d691850809fafa1b45b408b5b6c53bd32c11e530e6eff1b40612dcc658293`	pdf-javascript-stream	PDF /JS object 1 at offset 0x6317	914 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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