PDF malware analysis — malicious · da88a59e129fb08a

MALICIOUS

PDF

1.4 KB

MD5: 46a307054f591c09bcc63d6f3224b2c9 SHA-1: 63228488b9a0dbd6859d79b7fd9e50a81d833623 SHA-256: da88a59e129fb08aec527a71cc47a765e5cb756408f33142e36a6aa6ad4c6c75

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 document is designed to exploit this flaw. The embedded JavaScript likely attempts to download and execute a second-stage 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` `da8c98ee0fc5ff7dee1b283c18be8a86a879d2593f15c720f69fcd2f4249057e`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1291 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` `16397a383562b8371731ad4f9105ce640876fc2d01a524c2c25dc2d4b2e4112c`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x493	268 bytes

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