PDF malware analysis — malicious · 0f943e28e78b2af1

MALICIOUS

PDF

1.4 KB

MD5: 4a146586f3210af28afff4acac08ea05 SHA-1: 95916ea6f9a4ff1f49974671e75b82c1336cc5c5 SHA-256: 0f943e28e78b2af18bde2a4c2d175f2192307b6ea16ed4e7a6aa43d6058dc213

268 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains embedded JavaScript that exploits CVE-2009-4324 via the media.newPlayer method. The script attempts to download and execute a second-stage payload by constructing a URL from concatenated strings. The deobfuscated JavaScript reveals the use of unescape() and a complex string construction, indicating malicious intent to bypass detection and execute arbitrary code.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

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.
ClamAV: Pdf.Exploit.Agent-14406 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-14406
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` `76802a1bf01385d77d100923a84ca89acad217d1cdd0918c8555464df8ebb9d2`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1247 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` `8c9e5e535aec4dac10a1e5876ee2aece5837452f63d0b9ec7008b3041fc79ce7`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x485	240 bytes
`combined_document_js_000.js` `dded9aa41272cbd2e721196a48249e9971afa2ce2c859c81d0cfdc875cd9584c`	deobfuscated-js	combined document JavaScript streams at offset 0x160	1488 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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