PDF malware analysis — malicious · 6c06a97b15794cb4

MALICIOUS

PDF

1.4 KB

MD5: 8d2c8ae304f8de4e8ef3aac05f58b73b SHA-1: 21b43fdcb996d4241d20412e74aaff4a17ac5c12 SHA-256: 6c06a97b15794cb43051abaa2560dd2ac78e5aeace8d5e61a1f3087c3c7c294f

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 CVE-2009-4324 vulnerability (media.newPlayer) to achieve code execution. The script attempts to download and execute a secondary payload, as indicated by the exploit cluster firing and the ML classifier's high confidence. The deobfuscated JavaScript constructs a URL from concatenated strings, which is a common technique for downloading malicious content.

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` `8f880d568aee55d7060ffb2bfd694f2284327ab9f5ad1011e406677513dab125`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1256 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` `947785a7c4729078eb5f2a69ed7de5c44c4cf102a98b971691c35244d812335f`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x486	250 bytes
`combined_document_js_000.js` `4da58bc83a0b50df0663d128d4afba301ade81543dc34623ab630e360e02b420`	deobfuscated-js	combined document JavaScript streams at offset 0x160	1507 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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