PDF malware analysis — malicious · 4c5f8cd769b49cd7

MALICIOUS

PDF

3.3 KB

MD5: 93477ab87be6928c84cfac2d6e5dcc9e SHA-1: 5cbeadf0103cf6991c91f01319598c8965a5fcfd SHA-256: 4c5f8cd769b49cd7b951a811a40c335a0ae5aff517b2d0af20d4502ee1d2f204

178 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. A critical heuristic, CVE_2009_4324, specifically points to the exploitation of a vulnerability related to media player functionality. The presence of unescaped JavaScript and ClamAV detection further confirms malicious intent. The embedded JavaScript is likely designed to download and execute a second-stage payload, contributing to the overall attack.

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. (matched in decompressed stream)
ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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_obj0006_000.js` `e467b249d1b4bad7339270898877e5b1373411d60a3ecd68b0602277fb3a393e`	pdf-javascript-stream	PDF /JS object 6 at offset 0x187	2299 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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