PDF malware analysis — malicious · df30d96fc1dd0528

MALICIOUS

PDF

5.4 KB

MD5: 15532aad4e8a7b974dc441cc3591f968 SHA-1: a1d4703b2b664bba9eae6d021bfd13c36f5a346b SHA-256: df30d96fc1dd052829863f3ae1256b6052621e391c2be5845b4d86feff03ba81

248 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File: User Execution

The PDF file contains embedded JavaScript and U3D content, triggering critical heuristics for CVE-2011-2462, a known Adobe Reader U3D heap spray exploit. The JavaScript is obfuscated and likely used to facilitate the exploit, aiming to download and execute a secondary payload. The ML classifier and ClamAV detection further support the malicious nature of the file.

Machine Learning

Nyx PDF Classifier malicious score 0.9976

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` `3064817ac770fde1c5efebd7add11b7d18552714a711dc226d1ab97cc3612ab1`	pdf-javascript-stream	PDF /JS object 1 at offset 0xF	3506 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 0xF5B	58 bytes

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