PDF malware analysis — malicious · 4256a98fded463e3

MALICIOUS

PDF

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

MD5: 8a3f782c0c4b13e949a8ff422720ba42 SHA-1: 0b74692f2de41e4d1a090b5b9bf4bbeef8e4569e SHA-256: 4256a98fded463e329b41f66d7022ecec391d2070feba9ad67e9c87d3ec68faf

158 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript that is triggered by the OpenAction. The critical CVE-2009-4324 heuristic firing indicates the use of the media.newPlayer object, a known method for exploiting vulnerabilities in older PDF readers. The JavaScript itself appears obfuscated, but the presence of the exploit and the PDF structure strongly suggest an attempt to execute malicious code. The attack pattern is likely a lure to trick the user into opening the PDF, leading to the exploitation of the reader.

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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `26b6d6c649e8adab68e4616cdfe253cf76cb4b5f9b4f6ed783afd2bf46621931`	pdf-javascript-stream	PDF /JS object 13 at offset 0x396	2600 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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