PDF malware analysis — malicious · bd89b76a096adff6

MALICIOUS

PDF

2.0 KB

MD5: 72d52ea91508b46b1e556ecbe57c3388 SHA-1: b3fb9afdded1e9e3dfaf1ddef943710c4184d44f SHA-256: bd89b76a096adff63ef7d18ddc5eb938d12e5870f24e085a7b23d47f3dadc96d

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File

This PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2009_4324 heuristic suggests exploitation of a media player vulnerability. The embedded JavaScript, particularly the use of unescape() and heap spraying techniques, is characteristic of exploit code designed to download and execute a secondary payload. The ClamAV detection further confirms its malicious nature.

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.
ClamAV: Pdf.Exploit.JSCode-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.JSCode-1
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_obj0005_000.js` `4cbf52fe08f91d3e85c8c85c726cb30ce9c4a9c9853394fe8555e82be24e5a51`	pdf-javascript-stream	PDF /JS object 5 at offset 0x117	1483 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0005_001.js` `881dc73920875f239ad420bc2aec46a3117e509548848869b756ab4f4f82c23d`	pdf-javascript-stream	PDF /JS object 5 at offset 0x117	41 bytes

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