PDF malware analysis — malicious · 4a13daa97dd29bd3

MALICIOUS

PDF

187.5 KB

MD5: f27517a49ef63a1adb3110457875e88d SHA-1: 48efb9e33b77045d29a8ad1a345783a89ebe11a4 SHA-256: 4a13daa97dd29bd3f57d8c36f406540db86c6652fe9386005821d193b591b0ab

86 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 JavaScript T1059.007 JavaScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2009_4324 heuristic firing suggests exploitation of a vulnerability related to media.newPlayer. The JavaScript code itself appears obfuscated, using String.fromCharCode, and is likely responsible for executing a malicious payload. The extracted JavaScript files, javascript_obj0007_000.js and javascript_obj0007_001.js, further support the presence of malicious scripting.

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.
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape 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_obj0007_000.js` `7ba39a51889d3e29c480aa422c3d83ec0493f020b49082db6b9e663aa758314b`	pdf-javascript-stream	PDF /JS object 7 at offset 0x37B	959 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`javascript_obj0007_001.js` `43d753ed05fa5bb0df5b0aaed68c578071fcad80a8de40170b5dbc57042ebfc3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x37B	202 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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