PDF malware analysis — malicious · 2349b88f088b22d5

MALICIOUS

PDF

1.4 KB

MD5: 2aed9aea9f9cc82c0c661ec038f2249a SHA-1: 43c619c3e531573dc0902ce91d0f0117fab24973 SHA-256: 2349b88f088b22d5c0de03bad7008272f0eda0509e0fb250f86586356436d7e9

118 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1059.007 Command and Scripting Interpreter: JavaScript

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2009_4324 heuristic specifically points to a vulnerability in the media player functionality, commonly exploited via JavaScript in PDFs. The unescape() call suggests obfuscation of the JavaScript payload. The extracted JavaScript is likely responsible for downloading and executing a second-stage payload, a common technique for this type of exploit.

Heuristics 5

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)
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111111_000.js` `fa84edbe1f9ba948111dd0aac2cdac31c698f216321a90d575bcc6c70893f1a7`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1266 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`javascript_obj111112_001.js` `c178bd72791adc98c2a1cef70956d4510a7fe182b76af411213e922ab9c93491`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x48A	260 bytes

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