PDF malware analysis — malicious · 0116bba7d9a03975

MALICIOUS

PDF

6.3 KB

MD5: 3c907577cbae3825c0d8e77926cd03f0 SHA-1: f55af80405c33a36909139f1805e633f469e4442 SHA-256: 0116bba7d9a039750d6d73b324b60869d10db393102b89e7d7a87bb7f3e91653

308 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious Link

The PDF file contains embedded JavaScript that leverages a heap spray technique targeting a known vulnerability in Adobe Reader's U3D parser (CVE-2011-2462). The JavaScript is heavily obfuscated but the presence of the exploit cluster and U3D content strongly indicates an attempt to achieve arbitrary code execution. The `this.print` JavaScript call in the second stream suggests an attempt to trigger the exploit or a related action.

Machine Learning

Nyx PDF Classifier malicious score 0.9984

Heuristics 8

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.
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: 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` `b67ac6736cfc0009332771fa0983ded0a525bc7f6867faa6a1436f93d0d80977`	pdf-javascript-stream	PDF /JS object 1 at offset 0xF	4420 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 0x12A1	58 bytes

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