PDF / .PHP malware analysis — malicious · 398f9eba5f84f458

MALICIOUS

PDF / .PHP

79.1 KB

MD5: 511b96534de541ccad893ac768b38ba3 SHA-1: c9bbe3c20228a355c359eb1af408e0a1d10c4997 SHA-256: 398f9eba5f84f458dfaa154d4ab8ef47697ae1c31e0dcb8168c25d2c161ab38f

78 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript, which is triggered by a CVE-2009-4324 vulnerability related to the media.newPlayer annotation API. The JavaScript is obfuscated, but static analysis indicates it is likely designed to download and execute a second-stage payload. The extracted JavaScript file 'legacy_pdfkit_stage_000.js' is a strong indicator of this malicious behavior.

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` `73c135fc22b116b73d16cfa29be00787617121971d8d8040bb485f4e2aa37419`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	3583 bytes
`legacy_pdfkit_stage_000.js` `0a2b026bba8c4efb09566d695a2b6752bac3070fad4f3306884b493ab4e9e31d`	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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