PDF malware analysis — malicious · 4b8885099bdd8f9e

MALICIOUS

PDF

1.8 KB

MD5: 15d0606ec3e8a1687b9810ced43cfd1c SHA-1: 90702ef5426594ffd2b6c8aa715959a465b026dc SHA-256: 4b8885099bdd8f9ed6d57f6f01c40af82c04039b1d1494041576745305d299db

86 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1190 Exploit Public-Facing Application

The PDF file contains embedded JavaScript, which is obfuscated and uses String.fromCharCode, indicating malicious intent. The critical heuristic firing for CVE-2009-4324 (media.newPlayer) strongly suggests exploitation of a PDF reader vulnerability. The embedded JavaScript is likely responsible for executing the exploit or downloading 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. (matched in decompressed 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.
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0002_000.js` `47cb0aceb4aa84fefcad392e1a8f35f9d1bcf9cd78287c2ca854934dbe8653ca`	pdf-javascript-stream	PDF /JS object 2 at offset 0x1DB	939 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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