PDF malware analysis — malicious · 2eb20d35d8dd5ccd

MALICIOUS

PDF

80.3 KB

MD5: 66ad49cd349b8737fe2b82958f149052 SHA-1: 9e664e78d1eb3ec194fe251e96a6e474612ab48d SHA-256: 2eb20d35d8dd5ccdde8231c8703e8daf152f0d2a7e139f7b68aeb454249f79e0

78 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings. Specifically, the CVE-2009-4324 heuristic identifies a trigger related to media.newPlayer, suggesting exploitation of a known vulnerability. The deobfuscated JavaScript, found in legacy_pdfkit_stage_000.js, likely facilitates the download and execution of a secondary payload, a common technique for initial access.

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` `07a74381a0bf7375dc9b0d68a978bb0b88bacd68c406cf2472387712af1140e8`	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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