PDF malware analysis — malicious · 0106485531ed6a24

MALICIOUS

PDF

1.4 KB

MD5: 45ac52fc70713e49e338386e1cf346df SHA-1: f572508aa0da31b4d54a3e996b86b96c0c48094a SHA-256: 0106485531ed6a24a0e3d7acd979ebca172b9798a5992be1efcc784696ed028f

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

This PDF file contains embedded JavaScript that leverages the CVE-2009-4324 vulnerability via the media.newPlayer function. The JavaScript is heavily obfuscated but appears to be designed to download and execute a second-stage payload. The ML classifier strongly indicates maliciousness, and the exploit cluster confirms the exploitation 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` `611b4956812481760ab2d89e29df7ce75fd0c5d97dfdadeafa9cbc7f6c24ba37`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1237 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` `31a74f5ccf8d4e368036e1287bb0d697180c3a4c153e6da69c07093908cfd3b0`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x47C	251 bytes
`combined_document_js_000.js` `1be3f67b94495ed17ad9213fe57be180a48eaeb59de7e4e4c2bdfa6ce3978785`	deobfuscated-js	combined document JavaScript streams at offset 0x160	1489 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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