PDF / .TXT malware analysis — malicious · 24b2dcfbecb4b59e

MALICIOUS

PDF / .TXT

4.1 KB

MD5: 285550aadc6ef4246133a542bfb6c26c SHA-1: c04b239f867f2396f3ceee40b6d6bef60e1b84a4 SHA-256: 24b2dcfbecb4b59ed55a8cc8cde7abd00a26bbfe16ec560e3350a294d5f8a35a

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The deobfuscated JavaScript stream (acroform_b64_00.js) likely contains code to download and execute a secondary payload. The presence of eval() and String.fromCharCode() suggests obfuscation techniques commonly used to hide malicious JavaScript. The extracted artifacts are JavaScript files, further supporting the attack pattern.

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` `d3ab744a2bd558d5faeaf2193968b768d9fb820ddcccb6d1c1e16e554248c606`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6341 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` `7419c9ab2de5d8b0d4e0863d5db8c162a127f66cd05529c406deaceececc6beb`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3601 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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