PDF malware analysis — malicious · f41fec2825e5ceee

MALICIOUS

PDF

1.4 KB

MD5: b9f22277409a94a8a26c896bb4a78e73 SHA-1: 724d521f72e7a05a3f9239f43f9f355ea48acca8 SHA-256: f41fec2825e5ceee4985557405a9bb8259bc4669711c22080603c7beaf6e3ccf

118 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious File T1059.007 Command and Scripting Interpreter: JavaScript

The PDF file contains embedded JavaScript, which is triggered by the CVE-2009-4324 vulnerability related to media player actions. The JavaScript is obfuscated and likely intended to download and execute a second-stage payload. The presence of the unescape() function and the suspicious extracted artifact further support this assessment.

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)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded 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.
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_obj111111_000.js` `6cc1966415b1cee3d3a0e0f30b357dbd7587cfd7963a9a4775ba36b59f363d20`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1268 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`javascript_obj111112_001.js` `5183197b1af3f31ded851d4c9a30375c332d9e30b63f5b7051e7c53baddc3855`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x493	258 bytes

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