PDF malware analysis — malicious · 4e5e6aca0d9e06fb

MALICIOUS

PDF

1.4 KB

MD5: af45a6ff3b4a6728e681cf9296227433 SHA-1: 0499ba62c948c66104bb82b3ba1e4aabaf4ea394 SHA-256: 4e5e6aca0d9e06fb3600d7ef0c333a8b210cd2d5a73ceca1fa69da3168e97d5a

118 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious File T1059.007 Command and Scripting Interpreter: JavaScript

The PDF file contains embedded JavaScript, which is obfuscated and uses an unescape function. A critical heuristic identified the CVE-2009-4324 vulnerability related to the media.newPlayer object, indicating the JavaScript is likely intended to exploit this flaw. The embedded JavaScript streams, named 'javascript_obj111111_000.js' and 'javascript_obj111112_001.js', are the primary indicators of malicious activity, likely serving to download and execute a secondary payload.

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. (matched in decompressed stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111111_000.js` `81d5d7b04e0b5649dc89c834622a26efeb7603f2368af782b262c66316c2b0c0`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1267 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`javascript_obj111112_001.js` `d8ce05d558ec5f1d1e9e07039f8e5265b52049ad1f70c185ae5d72a31efcf33c`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x48C	262 bytes

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