PDF malware analysis — malicious · 81a8272ac24564d0

MALICIOUS

PDF

1.4 KB

MD5: af2edd4121ec400742df17da94a8e4d6 SHA-1: c948f63be2209f7023767bce1ff010c0b6925d2a SHA-256: 81a8272ac24564d0c7a1a7d42083c852622d81e0b446c6c752e373a683786401

268 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains JavaScript that exploits CVE-2009-4324 via the media.newPlayer function. The script is heavily obfuscated but appears to be designed to download and execute a second-stage payload. The critical heuristic firings for PDF JavaScript exploit cluster and CVE-2009-4324 strongly indicate this malicious behavior.

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-7277525-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7277525-0
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` `a5c8384d22b137bd2db0a7a7763f185f3a11a5d57ac2cb3134f5590b08b96339`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1244 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` `7968b6155c887587e77ee55bfdd1d925ded593319b61482ef383e7313837956e`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x47E	258 bytes
`combined_document_js_000.js` `8e1d4bc1c8e8a5d098289095c2b10294bc2adf54b0a1885dcdc518760a6bf5e2`	deobfuscated-js	combined document JavaScript streams at offset 0x160	1503 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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