PDF malware analysis — malicious · 92b9a55af7aeb667

MALICIOUS

PDF

346.5 KB

MD5: 2752fed8374d8ef2e0f93657b1315a8b SHA-1: 777cd81bf2688f3c15fd6378d2e5875bc2b33064 SHA-256: 92b9a55af7aeb6679e7700e731206f0c6b679c448bd814fb9699e4a14f813942

86 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious File T1059.007 Abuse Execution: 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 known vulnerability related to media player functionality within PDF viewers. The JavaScript itself appears obfuscated, using String.fromCharCode, and is likely responsible for downloading and executing a secondary payload. The extracted artifacts javascript_obj0007_000.js and javascript_obj0007_001.js further confirm the presence of JavaScript code.

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` `d2b8e606b1ac5847b51e1ff580d0ac56f698a909f0c189765a2488cec7c69003`	pdf-javascript-stream	PDF /JS object 7 at offset 0x37B	960 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`javascript_obj0007_001.js` `bbaa6a438780b55b78d9a3294aa078469c04ceafb7e852d9c0580419f3b3894d`	pdf-javascript-stream	PDF /JS object 7 at offset 0x37B	203 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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