PDF malware analysis — malicious · 5a7eb962f1fec2f1

MALICIOUS

PDF

1.4 KB

MD5: 4ef83f9d0a1603447c4cfd5880fd49e8 SHA-1: 9cb7b6dea3425a83830db7d3dada56d72105fad3 SHA-256: 5a7eb962f1fec2f1c1e93bb54a07e246d91f8e88dfe791b90c1920911bb8ddab

208 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file contains embedded JavaScript that leverages the CVE-2009-4324 vulnerability via the media.newPlayer object. The script is heavily obfuscated but appears to construct a URL from concatenated strings, which is then likely used to download and execute a secondary payload. The critical heuristic firings for PDF JavaScript exploits and the specific CVE strongly indicate malicious intent.

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` `6f9029600b6e6664237b1b43228a42c54f475f2d0ae0124fe79c9c8933a2555d`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1259 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` `3b648b3fec2bb6ff5590839ded2b642a171a61c03571cbdf4ded544619e4687e`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x485	246 bytes
`combined_document_js_000.js` `f1abc81906c609a7058561a2de58ad4cf28e1b5fd43b0f28c2b6716c39f2ed00`	deobfuscated-js	combined document JavaScript streams at offset 0x160	1506 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).

Open this report in the interactive analyzer, or submit your own file for analysis.