PDF malware analysis — malicious · e59fc4f8ed16f1b2

MALICIOUS

PDF

2.7 KB

MD5: 7f00c295918d86413df5ea0f95546fea SHA-1: 6abdaa4b8fe7b2cfcf20db6704cbbd92549af66e SHA-256: e59fc4f8ed16f1b285f88108a67ebc8cf5d42c3ef8134e0652f58332e438478e

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript streams, with one stream exhibiting an eval() call and another using String.fromCharCode, indicating obfuscated code execution. The heuristics suggest that this JavaScript is designed to download and execute a second-stage payload. The presence of multiple JavaScript objects and the obfuscation indicators point towards a downloader or droppper functionality.

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` `cd3793ce20930077fa4787469390ca2bf8c81af4176d0972372b0223fc21d8ed`	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` `46dcb66249b7a0698742cfbc00d8c16146c7db3ba7003ec76d920bcca10b1b4c`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x247	3008 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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