PDF malware analysis — malicious · 6b8e179141a0b76b

MALICIOUS

PDF

2.4 KB Created: 2009-08-15 14:11:11 Authoring application: Google

MD5: cdfba3cbafd0bc3362eda7fc2d00d93b SHA-1: 27162d4016cc6e4cc919194e23be6b781d493533 SHA-256: 6b8e179141a0b76b5a7bfa2cc1249a6fdb037ac61b4384354fb236a09567b50d

150 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document contains embedded JavaScript that exploits CVE-2009-4324 using the media.newPlayer method. This script is designed to download and execute a second-stage payload from the URL http://pplz.serveirc.com//l.php?i=16. The obfuscated JavaScript and the exploit technique strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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://pplz.serveirc.com//l.php?i=16

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `ed6d1fca6c14869f13eea5b8f466174a8eebd5020abb3057a3779778b48ff810`	pdf-javascript-stream	PDF /JS object 6 at offset 0x64D	583 bytes
`legacy_pdfkit_stage_000.js` `4eebc60c9bc8ba641da9246027a71e8c85bd69351c752eaaf128f3abdd340d49`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x18E	1466 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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