PDF malware analysis — malicious · 7b01af50a255d6e9

MALICIOUS

PDF

1.4 KB

MD5: f0d38cf5e1db98f0a26b2eab6539267e SHA-1: e6232585806d9c8c7bbc60d687d9d17640f6ed5c SHA-256: 7b01af50a255d6e938ba56152587723b8172e59e8770ca4ed5e23f0bc8003a89

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains embedded JavaScript that leverages the unescape() function and exploits CVE-2009-4324 via the media.newPlayer method. This JavaScript is designed to construct and execute a payload, indicated by the critical PDF_JS_EXPLOIT_CLUSTER and CVE_2009_4324 heuristic firings. The ML classifier also strongly suggests malicious intent. The script's primary function appears to be exploiting a known vulnerability to gain execution.

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` `aea8cb1d99dc8f229171f81c18b6aa15127ac3aa04baffde34d09dab20fb38f0`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1185 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`javascript_obj111112_001.js` `acbeaa9dda908f865c18d0d615161bcdc829c7e0f8c15128caa26b6b137bc29b`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x463	254 bytes
`combined_document_js_000.js` `bcf96ae58697bcd0701d8c5652506ca972406449dd62be120e9734636bd5ff35`	deobfuscated-js	combined document JavaScript streams at offset 0x160	1440 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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