PDF malware analysis — malicious · 80b1169974923da8

MALICIOUS

PDF

1.4 KB

MD5: eca360f95e3072f7266164332d916b5f SHA-1: e36965432761e8aa80950d3c121474ffc8208b79 SHA-256: 80b1169974923da82c3c81b62b122a4edff6f08fb193d83ab3157e180471cb61

208 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains embedded JavaScript that leverages CVE-2009-4324 (media.newPlayer) to execute arbitrary code. The script decodes and concatenates strings to form a URL, which is then used to download a second-stage payload. The reconstructed URL is http://www.example.com/malware.exe. The script also attempts to exploit the media.newPlayer function, indicating a client-side execution attempt.

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` `7dc54a79822b0bb2c385cb1ae8a11702879c9caea04bee7de992b7d40de83d9b`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1295 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` `1d2a8ae1fddec5efb65beb4d516d13907609da7b67dd0747f05481debb0b8494`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x494	281 bytes
`combined_document_js_000.js` `022037b5c3b94f186af022a7f175df93de6139564015f4b31fe97901bcdfb2e1`	deobfuscated-js	combined document JavaScript streams at offset 0x160	1577 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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