PDF / .TXT malware analysis — malicious · 32424d3a0986156e

MALICIOUS

PDF / .TXT

4.1 KB

MD5: add7599e2394f705c995b31dac69784b SHA-1: a92a9a76876fc9d8d7d121bde09e4ecb92b4eb8b SHA-256: 32424d3a0986156e4a28d278e1d5c27530bb7f02eee2a49b1941415303810eae

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1027 Obfuscated Files or Information

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_EVAL heuristic firing suggests that the JavaScript code is being executed using eval(), a common technique for obfuscation. The deobfuscated JavaScript file 'acroform_b64_00.js' was extracted, and its presence, along with the obfuscation indicators, strongly suggests the script is designed to download and execute a secondary payload. The lack of specific IOCs like URLs or hashes in the provided evidence prevents a more precise attribution or identification of the payload.

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_obj0013_001.js` `99d10c310f0ac922d95ab6233c120766dd13b15c97ddc53c94aa131750cd7e31`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6401 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`acroform_b64_00.js` `5aecf182e8d7d919776346eb4838e0353abd90b222d59ad2c3c6a19cb805f044`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3646 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 3 long base64-like blob(s).

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