PDF malware analysis — malicious · b6c0cd63e26c1a03

MALICIOUS

PDF

43.3 KB

MD5: b86366d45e205a8504b0af6071691495 SHA-1: e8a8a913dc0bc12b0fed2a8f170a7d0146a677b0 SHA-256: b6c0cd63e26c1a0310f34b6524b6a869c693c9f642c79c69b5db7a3fd33ad4e5

78 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF document contains embedded JavaScript, indicated by multiple heuristic firings. Specifically, the CVE-2009-4324 heuristic identifies the use of `media.newPlayer` via annotation actions, a known method for exploiting this vulnerability. The deobfuscated JavaScript (`legacy_pdfkit_stage_000.js`) likely facilitates the download and execution of a secondary payload, although its exact functionality is obscured. The presence of obfuscated JavaScript and the exploitation of a known PDF vulnerability strongly suggest a malicious intent to compromise the user's system.

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` `02e0263b37670ad89a51f4afe6a660e13c0b6a58019ef0fe7c0f011ff4e703f9`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	2205 bytes
`legacy_pdfkit_stage_000.js` `34724b4176b0e989bf73d0fc9ae205c6fc8236b3698a34a94365aab3ab91b629`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xAB8	2756 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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