PDF malware analysis — malicious · b31428d5afa30c33

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: ce0292f1d7c0b883ca2577f746f655d0 SHA-1: 68e1b8242bdbdba4a115bd45efc18749bfa11aa0 SHA-256: b31428d5afa30c33e0fec0bfc8968df7bc8f74dabccc8efa3daec9bda14ecac6

158 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF document contains embedded JavaScript triggered by an OpenAction, exploiting CVE-2009-4324 using the media.newPlayer method. The embedded JavaScript, particularly javascript_obj0013_001.js, is obfuscated but appears designed to download and execute a second-stage payload. The use of Scribus as the authoring application is noted but does not directly attribute the sample to a specific family.

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` `dc7a754d8e3cf8a24b5a34bb6dc30b2963b513cf2ce307e6c0006914c408cfe6`	pdf-javascript-stream	PDF /JS object 1 at offset 0x16	32 bytes
`javascript_obj0013_001.js` `6f83d716fca4be7eeacaf3a6b924a76916c2a4b14a75585ec21abdda8457bb23`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3A4	2658 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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