PDF malware analysis — malicious · 0d4e77c9874f294e

MALICIOUS

PDF

1.4 KB

MD5: 970ee7329f1a427cb6a865daf7d35870 SHA-1: 7f4394da44d8780dce0197c38d7ae46df0a693a8 SHA-256: 0d4e77c9874f294e69f82d1625e325890bf15e95c8540cea83b2f65e173139ad

208 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains embedded JavaScript that leverages the CVE-2009-4324 vulnerability via the media.newPlayer call. The script is heavily obfuscated but appears to construct a large string and then attempts to execute it. This is a common technique for downloading and executing further malicious content.

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. (matched in decompressed stream)
PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111111_000.js` `05d64a855447dcb4c0ecf3819d3f413d4e01b30eeabc71a3c28cef48e3770648`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1262 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` `8f92871c7a73cc4e263229f159fad1800f4ff4f693607ad8ea09c2abb04b7713`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x48D	261 bytes
`combined_document_js_000.js` `0aaa92f47ad2cf853f692eb1066eab97d87fe5d9f31b80a35d9ec9b1ba64d5fd`	deobfuscated-js	combined document JavaScript streams at offset 0x160	1524 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).

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