PDF malware analysis — malicious · 24e70bec90704219

MALICIOUS

PDF

17.2 KB

MD5: cfc325917b5a6e0f98de537212c099b0 SHA-1: 015a8e5a9015f7f44a41d95e3e166100f2cd4657 SHA-256: 24e70bec9070421901c7a7de49f3bc11f82b45546adf9f6069558dabd7ad852e

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF document contains obfuscated JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The critical CVE_2009_4324 heuristic specifically points to the use of the media.newPlayer sink with percent-array decoded JavaScript, a known technique for exploiting this vulnerability. The embedded JavaScript streams, particularly the deobfuscated ones, suggest the primary intent is to download and execute a secondary payload. The obfuscation and use of a known exploit indicate a malicious intent, likely for further system compromise.

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)
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111711_000.js` `78af5c5b9a8743745618ea36af6d87bd14f2c67d3886200ea3877f0bf464708c`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3152 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).
`javascript_obj111712_001.js` `3426afeb6f570180f08a7b2108d84dbf7ee3aa53972fec085e9025418908860c`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xE14	11494 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 6 long base64-like blob(s).
`javascript_obj111713_002.js` `557aed43ce08bb1b9562cd37e3c6d208f8c64d2c78999f54dbfaf385492e293d`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x3B30	2418 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `77e31ee392e03e0109a99a651a1f965cc21f4a579111db265d7fa458cb9d2899`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xE14	1080 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` `fa44c3a6a5df9dd0c4918db03b8a33dc1e24bba8204a13d66510a81c2b2e6f17`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x3B30	166 bytes
`legacy_pdfkit_stage_002.js` `4750eb094e2f1fb5e48024f77432c49411171145652fd310a6c0f73f1a851f95`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xE14	1247 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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