PDF malware analysis — malicious · 6a627115633d109c

MALICIOUS

PDF

1.4 KB

MD5: cd4e711fc2588889b05d4f8c1996438e SHA-1: 0bdd1840409b490006b7f5329d8ced13aa1a9541 SHA-256: 6a627115633d109c91e1643e3d8cb4fe49e22645e8214f35d8eefc2760d66dc3

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 unescape() function and exploits CVE-2009-4324 via the media.newPlayer object. The JavaScript code appears to be obfuscated and constructs a large string which is then used in conjunction with the exploit. The primary goal is to achieve arbitrary code execution within the context of the vulnerable PDF reader.

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` `e7216a924cfecd0f20623e7646eea7cffa1d3ae938fe02ec72d3e0ec0bcfd46b`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1260 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` `bbb468bc37a17c4cb8e9dc787f49d24c0a5d5096815afb86f8b1bc808c6db5f9`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x484	256 bytes
`combined_document_js_000.js` `3ca905dabcf64842ba46da696c76eb5e8f13e5b75356e6afacaa2e3b1c0ed155`	deobfuscated-js	combined document JavaScript streams at offset 0x160	1517 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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