PDF malware analysis — malicious · 95bf2c71300850e3

MALICIOUS

PDF

2.7 KB

MD5: 4acabb0d96cd299f6efd8feb25b78344 SHA-1: 8dee4f8075c89a8a279451c51738335d7547c195 SHA-256: 95bf2c71300850e33899dd9a218701262034755ca81e194570bf72d88961993b

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, PDF_EVAL, and PDF_FROMCHARCODE. The presence of eval() and String.fromCharCode in the decoded streams suggests the script is heavily obfuscated and likely designed to download and execute a secondary payload. The extracted JavaScript files, javascript_obj111711_000.js and javascript_obj111712_001.js, further support this, with one being particularly large and containing obfuscated code.

Heuristics 5

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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111711_000.js` `4a642549b62c2ff4663d1cda69fb49420be9377f8e190757306fcce07e4e40c6`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x197	371 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj111712_001.js` `0c87ebe0dbbf2c94ee63a051c43d6235eca40d66fe644398aa7c81c27cf74d99`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x247	2998 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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