PDF malware analysis — malicious · 309cbae82f1987b0

MALICIOUS

PDF

79.1 KB

MD5: 8151a0750cfe94b8c5e55cae03059d68 SHA-1: 8e145358a2bd7a6e4576c1e6bc81005ba2a1520a SHA-256: 309cbae82f1987b0efe7c87ce4dfa5ada5c1ff6284cea84b19125cb14235bdc0

138 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File Execution: Malicious File

The PDF file contains embedded JavaScript and triggers CVE-2009-4324 via the media.newPlayer API. This indicates an attempt to execute arbitrary code by exploiting a vulnerability in the PDF reader. The embedded JavaScript, identified as legacy_pdfkit_stage_000.js, is likely responsible for the exploit execution. The ClamAV detection further supports the malicious nature of the file.

Heuristics 5

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)
ClamAV: Pdf.Exploit.Agent-21886 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-21886
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` `ce7af546c7843409e9f463ed28b1ae93067c7fbed214cbc55699c17d7ece3219`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	3583 bytes
`legacy_pdfkit_stage_000.js` `45b32239c76897787145f34b324ce5bc925d33cfc1639da99f21711c7c9cf5cc`	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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