PDF malware analysis — malicious · 0ec5c6b3e24001f6

MALICIOUS

PDF

79.1 KB

MD5: 2bf405c2a7cb55f72e5937b3f9db745e SHA-1: 4319164eee52dde8b103c81741cd43f670678c19 SHA-256: 0ec5c6b3e24001f6c5a849c64b9c033f865e1f188e00ebdb97590f1034ed1dd6

150 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF exploits CVE-2009-4324 using embedded JavaScript to download a second-stage payload from the URL http://ezuis.in/x/l.php?s=newp&&. The JavaScript code appears to be obfuscated and attempts to download and execute further malicious content, indicating a downloader or dropper functionality.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

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)
PDF JavaScript shellcode contains an embedded download URL high PDF_JS_SHELLCODE_DOWNLOAD_URL

Decoded PDF JavaScript shellcode contains a hardcoded http(s) URL stored as little-endian %uXXXX Unicode escapes. Reader exploit shellcode embeds the second-stage fetch URL this way and pulls it down with a urlmon/URLDownloadToFile-style download-and-execute (commodity downloader behaviour rather than a specific Acrobat CVE).
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://ezuis.in/x/l.php?s=newp&&

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0008_000.js` `f95068bdb2833ac749da8a0861f5060e246ad62dcefcf17961c82e36281fb3ba`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	3583 bytes
`javascript_obj0008_001.js` `cc567776478255aa64fc39f5bd3e5fde1eb6faadd86619fb82fc916cf32768ea`	pdf-javascript-stream	PDF /JS object 8 at offset 0x209	80451 bytes
`legacy_pdfkit_stage_000.js` `a269e935e0b7c56d38baff9b1dd992d545670e3a8c288813c902c4d704a17ef3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x101A	2552 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` `42025b552c7960b53abcd8cd732b01c8d109eccfdfefc352b9826c4d5807d414`	deobfuscated-js	cross-stage annotation API aliases at offset 0x1E7	81 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.