PDF malware analysis — malicious · 55ee024224cc01d1

MALICIOUS

PDF

79.1 KB

MD5: 8904f978b0b777a9ff1942e6bd599182 SHA-1: 51d28e9853133c25dcb1b0e78394f8fcf2659dfb SHA-256: 55ee024224cc01d132bc575d8ad44d118ce10afca7395bd553553587f237ebcf

78 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript, which is triggered by a vulnerability (CVE-2009-4324) related to the media.newPlayer API. The deobfuscated JavaScript, found in legacy_pdfkit_stage_000.js, likely attempts to download and execute a second-stage payload. The presence of obfuscation indicators and the nature of the exploit suggest a downloader or dropper functionality.

Heuristics 4

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. (identified after JavaScript deobfuscation)
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0008_000.js` `1dd7ab5c21864a2a04fc0ca40d581d8e2ae557fb531340722f48c37f821add15`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	3583 bytes
`legacy_pdfkit_stage_000.js` `38de71134fc98f3e488b5bb28eba1c79fa876b75772d9adb248908c30313de86`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x101A	2552 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `42025b552c7960b53abcd8cd732b01c8d109eccfdfefc352b9826c4d5807d414`	deobfuscated-js	cross-stage annotation API aliases at offset 0x1E7	81 bytes

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