PDF malware analysis — malicious · 6f3752ad04ae7704

MALICIOUS

PDF

1.4 KB

MD5: 8cf11fe323ceb1b1c1723d1ae33ad660 SHA-1: 54de08f40a0faae162526a66bf934cff369cb989 SHA-256: 6f3752ad04ae7704e0fbaa084465db79dc03f58f65dc56525344d9204b000841

208 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains embedded JavaScript that is heavily obfuscated and uses unescape() calls. Heuristics indicate this JavaScript is part of an exploit cluster targeting CVE-2009-4324, specifically related to the media.newPlayer object. The script attempts to trigger this exploit by calling this.media.newPlayer(null).

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` `8575f63cc2a1c256e8c24b942991025b98e2835e5ddb25abf5550f86d448abea`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1275 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` `14afb11827f809051152c7092b527dc0ea93f695e985c04a013ac49f670839f6`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x48F	259 bytes
`combined_document_js_000.js` `de45cfcefdabe7c33a94ffce6efed19ed7a845e35fa54a497a909608d60fdc1f`	deobfuscated-js	combined document JavaScript streams at offset 0x160	1535 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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