PDF malware analysis — malicious · 6df21b759101d111

MALICIOUS

PDF

1.4 KB

MD5: 9b289eeb4d7aa2cf8ada09811dfd336e SHA-1: c8b87796dc67b06d074f5aba7cbc5779fa29b145 SHA-256: 6df21b759101d1115302a3f3dde80380208bcfb679c899709ec1b9847a555952

268 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript that leverages the CVE-2009-4324 vulnerability via the media.newPlayer object. The script attempts to construct a large string by concatenating and repeating encoded segments, likely to prepare for an exploit. This is further supported by critical heuristics indicating a PDF JavaScript exploit cluster and ClamAV detection as Pdf.Exploit.Agent-21284. The script's primary function appears to be triggering an exploit to download and execute a secondary payload.

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-21284 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-21284
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` `45d88072a1f1d9fabecd871a84d9fde02013eab4dad6c07013316d7038f842e0`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1261 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` `e4bbe8212e25fe47b85206fb72de219752fc83c6eea29c7446bf7aa7392ac9cc`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x486	267 bytes
`combined_document_js_000.js` `34fda6d3f301872ca912661923d82aec0a5febfe235285130c919200c5345f10`	deobfuscated-js	combined document JavaScript streams at offset 0x160	1529 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).

Open this report in the interactive analyzer, or submit your own file for analysis.