PDF malware analysis — malicious · b80710a28deda3c2

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: 95c384ca1dca7fcbe6e5c491c0ede382 SHA-1: adce20165bde7f568e3cd8bf1edac0adb55e8fc8 SHA-256: b80710a28deda3c25d9adc0facfc802338d123e590d74fb963eee39bb1305690

158 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious File T1059.001 Command and Scripting Interpreter: PowerShell T1059.003 Command and Scripting Interpreter: Windows Command Shell

The PDF file contains embedded JavaScript and is configured with an OpenAction to trigger script execution upon opening. A critical heuristic firing indicates exploitation of CVE-2009-4324 via the media.newPlayer function. The embedded JavaScript is obfuscated, but the presence of unescape() calls and the overall structure suggest it is designed to download and execute a second-stage payload. The file's metadata indicates it was authored using Scribus, a legitimate document creation tool, but the malicious content points to a phishing or exploit delivery attempt.

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` `6e9a9bacc99ebe75eea10d30e6863bff0d086dab1f191b32feb342c621f75c12`	pdf-javascript-stream	PDF /JS object 13 at offset 0x39A	2628 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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