PDF malware analysis — malicious · 9ebbe3a87fc46c92

MALICIOUS

PDF

80.3 KB

MD5: d2ff53e8c26804b23ba30e21c3a246d2 SHA-1: 2b1f660987c72ab530ada33bf1de04149fdfc4e7 SHA-256: 9ebbe3a87fc46c9235bc7587f6f5c5645f837e31ec932d8a6ce2907ebd6d7b03

78 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. Specifically, the CVE_2009_4324 heuristic firing on media.newPlayer suggests an exploit targeting a known vulnerability in older PDF readers. The deobfuscated JavaScript, identified as 'legacy_pdfkit_stage_000.js', likely facilitates the execution of malicious code, potentially downloading a second-stage payload. The presence of 'pdfkit' in the extracted artifacts further supports this attack vector.

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` `84a4864348a2188fe7b1f5621dbab7fe0324111d42ba6c9909fe98cbf02cdf44`	pdf-javascript-stream	PDF /JS object 8 at offset 0x217	3783 bytes
`legacy_pdfkit_stage_000.js` `d25d4c802e488a26bbca7ee7d2ca95e2dd1a9063dd746985326737a9e7fcc802`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x111A	2586 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 0x217	81 bytes

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