PDF malware analysis — malicious · e76679f17f55a85e

MALICIOUS

PDF

5.6 KB

MD5: de3f8df7a5af9f360cd8d3b91875bb96 SHA-1: 9c367e09fed2639422157d677545b21ce2bdb24f SHA-256: e76679f17f55a85ea4889d638d54e7865df38214a3002749c8fd204f5812c219

248 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File

This PDF file contains U3D content and embedded JavaScript, triggering critical heuristics for CVE-2011-2462, a U3D heap spray exploit in Adobe Reader. The embedded JavaScript, particularly the `unescape()` call, suggests an attempt to obfuscate malicious code. The primary intent appears to be exploiting this known vulnerability to gain initial access and likely download further malicious payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9961

Heuristics 7

Adobe Reader U3D parser exploit with JavaScript heap spray critical CVE likely CVE_2011_2462_U3D_HEAPSPRAY

PDF combines U3D/3D annotation content with JavaScript heap-spray shellcode. Public CVE-2011-2462 exploit chains use a crafted U3D stream and JavaScript heap spray to control memory during Adobe Reader's U3D parser corruption.
U3D/3D content in PDF — Adobe Reader 3D parser CVE-family indicator high CVE related PDF_U3D_CVE_RELATED

PDF contains U3D (Universal 3D) or 3D annotation content — CVE-2011-2462 and CVE-2009-3953 are critical vulnerabilities in Adobe Reader's U3D processing that allow arbitrary code execution. U3D content in PDFs is extremely rare in normal documents.
ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0001_000.js` `b170c65d0b799d7519135023d46313595083c8652795f4440c4fa3510e224e82`	pdf-javascript-stream	PDF /JS object 1 at offset 0xF	3691 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).
`javascript_obj0002_001.js` `53ef3e86395c29047481d41061937b32759780f8b45be9739a0a576f50df45b1`	pdf-javascript-stream	PDF /JS object 2 at offset 0x1019	58 bytes

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