PDF malware analysis — malicious · 08ff82a0a679eae5

MALICIOUS

PDF

1.4 KB

MD5: 7e77647c3e57a92fae4cf0912ffd8534 SHA-1: 0dce70e9eef9e18ed1ab28d421a10f9671a158ec SHA-256: 08ff82a0a679eae501aa5bb785e72419e586aeff77241126570d3894a515c4c1

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains embedded JavaScript that is obfuscated and utilizes the unescape function. Critical heuristics indicate a PDF JavaScript exploit cluster, specifically targeting CVE-2009-4324 via the media.newPlayer function. The script attempts to exploit this vulnerability, likely to download and execute a secondary payload.

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` `efeaa6d2c98ede5c46d1d28da63fcdd017080e9e5d7d77453c2a2857e8f43355`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1272 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` `ce0d7d30f893d4ad3ceba708962d7fef9b7241b63bea605f53aad176acc57c6c`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x48C	251 bytes
`combined_document_js_000.js` `4693b18a2a3c709f47c86d52940ac5bf7a501fefcc60b7c5b4ac149f8cda8154`	deobfuscated-js	combined document JavaScript streams at offset 0x160	1524 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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