PDF malware analysis — malicious · 958e67fc5fd0d150

MALICIOUS

PDF

4.1 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 7d3e86b12e18c237765f1cc7c1179499 SHA-1: e10dfd5ab9f9c56defb12fbc2ba9ada4676ffb18 SHA-256: 958e67fc5fd0d15036f7cc1b4481fb42da4492d5108cad80198f6378872c1001

158 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript triggered by an OpenAction, indicating an attempt to exploit a vulnerability. Specifically, the 'media.newPlayer' heuristic firing points to CVE-2009-4324. The unescape function is also used, suggesting obfuscation of the malicious JavaScript. The embedded JavaScript, particularly the large 'javascript_obj0013_001.js' file, is likely responsible for downloading and executing a secondary payload.

Heuristics 6

media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324

PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009.
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
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.
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_obj0001_000.js` `19fc51b96d1af5282f95ebb67f4a5e85379f59cdfeb8f10db8f1ece8ac23de58`	pdf-javascript-stream	PDF /JS object 1 at offset 0x16	34 bytes
`javascript_obj0013_001.js` `64294ab6e710c60c54aaca83aa1671ca3db582d6203e40f216fdc25a404eddd3`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3A6	2618 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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