PDF malware analysis — malicious · 432e74924257a709

MALICIOUS

PDF

3.9 KB

MD5: 54546d5199e4d12aced74f6246a13403 SHA-1: 302f7788e38590e99876f670e211687111fa48a3 SHA-256: 432e74924257a7093beb8c7dfc47608a8b141082fa7696432a240f6663a61c14

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains multiple JavaScript streams, with one exhibiting high-confidence `eval()` usage and another using `String.fromCharCode`. These heuristics indicate obfuscated JavaScript code, likely designed to download and execute a secondary payload. The presence of these techniques suggests a malicious document, but without further analysis of the script's output, the specific family remains unknown.

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` `b4b861d30fd4b3d4f38acf4567dda1840cc289070cce14317c60c5908ed6d34e`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x197	370 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj111712_001.js` `9ad5fbb454590e95057ad770b92ad31221f498033af63cb7e2eaa0987b2c2af9`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x246	5248 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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