PDF malware analysis — malicious · 89ae780576454043

MALICIOUS

PDF

3.9 KB

MD5: a39d1e821e7f19f9490e4e4173095e70 SHA-1: 795fc6031c74ac443e16aabc91798e67603935af SHA-256: 89ae780576454043ade1ecc25294b2d90156bd2840143836f904bc07ecfe2ae1

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, PDF_EVAL, and PDF_FROMCHARCODE. The JavaScript streams, named javascript_obj111611_000.js and javascript_obj111612_001.js, are suspicious due to obfuscation indicators. The presence of eval() and String.fromCharCode suggests the script is designed to execute arbitrary code, likely downloading and executing a second-stage payload. The document body content is unreadable, providing no further context.

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_obj111611_000.js` `65eefad878e1386d391a73e43c800a6d782e721b046ada48446f1214c273cdb2`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x197	258 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj111612_001.js` `060231dc4dc9728451d938739058c8a1022a4dbab476318eb05b3482b970ce8f`	pdf-javascript-stream	PDF /JS object 111612 at offset 0x268	5529 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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