PDF malware analysis — malicious · 27b3fe3b9350f8cb

MALICIOUS

PDF

1.4 KB

MD5: d47c992d40e76b8f72938e9724fbf01e SHA-1: 3a5d5d5987082be67044374641fe28f4062044d1 SHA-256: 27b3fe3b9350f8cbc82b0a259705befeb819b4e0806a255ad7997bfee6686c2b

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 the unescape() function. A critical heuristic identified the CVE-2009-4324 vulnerability related to media.newPlayer, indicating the script is likely designed to exploit this flaw. The script's purpose is to execute arbitrary code, likely leading to a further stage of infection.

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` `8fcb9ee42e6841ff4f55a584ea83c5cdbfc1e8e3162654c52976dc35ba810368`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1268 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` `10e4a6350e73cf12081058133b7164229e6e4ed03f8358f4850260794a07660a`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x48A	270 bytes

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