PDF malware analysis — malicious · dd68dc758e085425

MALICIOUS

PDF

89.1 KB

MD5: 3c30d6d45c7ea811c9321b0fe4233536 SHA-1: 1525f49e3ab33ab00a597c080fd6ce6be772e435 SHA-256: dd68dc758e085425863e19aca2daa48d7f6e6e97d0ec06e8eb1e8fa6f7ed8da1

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. A critical heuristic identified the CVE-2009-4324 vulnerability, which is associated with the media.newPlayer object in Adobe Reader. The JavaScript uses String.fromCharCode for obfuscation, suggesting an attempt to hide malicious code execution. The primary intent appears to be exploiting this CVE to run arbitrary code, likely to download and execute a secondary payload.

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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