Pdf.Dropper.Agent-7255721-0 PDF malware analysis — malicious · 44a2afdf471e8a15

MALICIOUS

PDF

1.4 KB

MD5: 4d89f5425b89d43f28f3613c100d9f62 SHA-1: 5f33c60d9d14340bb7fb95369ee300fb90c854ad SHA-256: 44a2afdf471e8a15aeffdacd384edde1c4e5f15659428d2920b50b2dd26868c6

268 Risk Score

Malware Insights

Pdf.Dropper.Agent-7255721-0 · confidence 95%

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 construct a large string, likely a payload, and then calls `this.media.newPlayer(null)` which is a known indicator for this exploit. The ClamAV detection name 'Pdf.Dropper.Agent-7255721-0' further supports its role as a dropper.

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.Dropper.Agent-7255721-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7255721-0
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` `1417a8906f50209f74e58e38edf73efa9a649855075486ff2d5220f1c2f4eeb4`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1268 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` `170e7c79b4322692b632f33340ccb5589d6e7fe53acfc772efdc430f170d60c3`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x48B	253 bytes
`combined_document_js_000.js` `f720db095f47f1332bae44e471c097c5c16d88780759ec97b111f120dfba5574`	deobfuscated-js	combined document JavaScript streams at offset 0x160	1522 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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