PDF / .TXT malware analysis — malicious · e8c74fbae5c3af7f

MALICIOUS

PDF / .TXT

4.0 KB

MD5: 39c30eac46af1fcaf7489a3337db49dc SHA-1: 7ecf658892a5e7551861e63d8342504eaf456457 SHA-256: e8c74fbae5c3af7f23c4830bbd736edee7ba59c5fff632782ed7b6e111eab662

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream utilizes eval() and String.fromCharCode, suggesting obfuscation and dynamic code execution. The deobfuscated JavaScript file 'acroform_b64_00.js' likely contains code to download and execute a secondary payload. The presence of these elements strongly suggests a malicious intent to compromise the user's system.

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` `b506567a28b2eef1604a207b2c8f89ec52bf507c0c4ad7b77c75f6b57ebea5ab`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6305 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` `567f2b2b7d79c154dc40799ad8b46244f22ca3e1e4f928997450e76dc71e3a62`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3575 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).

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