PDF malware analysis — malicious · b24244fa8e39bf0e

MALICIOUS

PDF

3.2 KB Created: 2008-08-28 00:17:57 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 746f87f5fcf309bc0c5bc422007f3740 SHA-1: 60d993bd107861fa0880846d1a852b17362bc7f9 SHA-256: b24244fa8e39bf0e58dae018eba3c409c34064f81b1361c5f8ab74aa56db077d

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF contains embedded JavaScript, with heuristics indicating obfuscation and the use of eval() and String.fromCharCode. This suggests the script is designed to execute arbitrary code, likely to download and run a second-stage payload. The extracted artifacts 'deobfuscated.js' and 'javascript_obj0013_000.js' are the primary indicators of this malicious behavior.

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_000.js` `cb4114cbdc1fa3557f2def5b3a28fd33ae3c381c17bdccedd4409baaff427c12`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3CE	5474 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`deobfuscated.js` `f2318f831e6c53d2764df0bfdec81ab7659af5acd37aefb776ce99be325d312b`	deobfuscated-js	PDF JavaScript deobfuscation pass	12837 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).

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