PDF malware analysis — malicious · 4a08c224cc7d99b7

MALICIOUS

PDF

1.4 KB

MD5: d753e62e028f35200ee3593439873234 SHA-1: d0a3a1f095540486619b18fba91025223584b500 SHA-256: 4a08c224cc7d99b77a0a44706c9235436ef24a6155b0ff29398ca8e10b8da4f3

148 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file contains embedded JavaScript, which is triggered by a CVE-2009-4324 exploit targeting the media player functionality. The ML classifier strongly indicates malicious intent. The JavaScript is likely responsible for executing a malicious payload, although its exact function is obfuscated. No specific family could be identified.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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` `47dcd862c86959570dee9b0283ec679e8d39cf8b6fcc86a3dbad3755803895cc`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1258 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` `b861aec868f0999b357b598578b84c645fab9e39ab21caa417f90f52c226d9d8`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x48B	269 bytes

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