PDF malware analysis — malicious · bcdf8ff03198fa5c

MALICIOUS

PDF

79.1 KB

MD5: a7f0b8f6d569e62945c6b6205db1de4c SHA-1: 750819e6a41cdd6565664d103fb813827f9b3155 SHA-256: bcdf8ff03198fa5c256d1e3a0a97e75d96e4f41ac97ef8d21e18403515513386

78 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious File T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains embedded JavaScript and exploits CVE-2009-4324 using the media.newPlayer function. This indicates the document is designed to execute malicious code upon opening. The deobfuscated JavaScript, 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` `60ce870c131c7163f1377f28ebc22da9518ce3eefd919eee2a63ccadbf70641c`	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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