PDF malware analysis — malicious · 6b5190024aee23cc

MALICIOUS

PDF

1.4 KB

MD5: 10d0d3cc593318b10306ae8543af8324 SHA-1: 4e86fd2e6311a8a64548edf9479f40730f9e865a SHA-256: 6b5190024aee23cc017d891286650409e3209ce75b2af98f4d65a967e43788b4

268 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file contains obfuscated JavaScript that leverages the CVE-2009-4324 vulnerability via the media.newPlayer method. The script attempts to construct a large string and then trigger the exploit, indicating it's designed to download and execute a secondary payload. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

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.
ClamAV: Pdf.Dropper.Agent-7269711-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7269711-0
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` `955150df15a8f96b5c5ab161fb193ae7f371a7a34a38d0d2f04c063d340a70c1`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1255 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` `ff84dd37d8a7fca2131e0009338565abcf5c686f3fa069293ee592a7f6ae3bc3`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x482	253 bytes
`combined_document_js_000.js` `cd53b927af7302e536e4ad450f227d1622eb501d5d694f1b3d462846a2a04e26`	deobfuscated-js	combined document JavaScript streams at offset 0x160	1509 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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