PDF malware analysis — malicious · a7514b96903e6825

MALICIOUS

PDF

6.7 KB Created: 2009-11-17 23:22:12 Authoring application: Scribus 1.3.5svn (via Scribus PDF Library 1.3.5svn)

MD5: ac333784e724e11a72283c9aaab54523 SHA-1: 4e00ba99eef62de721bf321d705abbc564f8007d SHA-256: a7514b96903e6825d0cd33cb641f47c583d7bbc25f10ca302d727cf8677a4f8e

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The JavaScript stream, identified as 'javascript_obj0016_001.js', appears to be obfuscated, as suggested by the 'Script obfuscation indicators' triage signal. This script is likely responsible for downloading and executing a second-stage payload. The presence of unescape() and String.fromCharCode calls further supports the obfuscation and execution of malicious code.

Heuristics 5

unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0016_001.js` `2e5c081f2d5688366e74ce185003f5974943af6bcb202f98c5219cf66755e143`	pdf-javascript-stream	PDF /JS object 16 at offset 0xC9A	12549 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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