PDF malware analysis — malicious · cd21a0b4d4a7634e

MALICIOUS

PDF

1.1 KB

MD5: 1a3de866230d9a0321e4454c1683a807 SHA-1: 3ed485ba714728ce8bbbe4a34b232c26c1024132 SHA-256: cd21a0b4d4a7634eaded995a174dd4a70e97d38caeb11d9d97f6a7ce0587fe6a

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 firing suggests exploitation of a vulnerability related to media player objects. The embedded JavaScript, identified as javascript_obj0005_000.js, uses an unescape() call, which is often used to deobfuscate malicious code. The script's purpose is likely to download and execute a second-stage payload, leveraging the identified vulnerability to bypass user interaction.

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.
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_obj0005_000.js` `43f8843c1de57f544fad39f361c41435cb444c5f3a8d65114b3dca9c5889da4c`	pdf-javascript-stream	PDF /JS object 5 at offset 0x117	604 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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