PDF malware analysis — malicious · a71650b96cc92e04

MALICIOUS

PDF

5.5 KB

MD5: 64a6c75ff1a4548ae91d73d804f85300 SHA-1: 0452441f28ae4b685167a7ea2a305894dc4535c0 SHA-256: a71650b96cc92e045487a8b24bf5bd5e14148af9a57476fa5556534905e87d64

158 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File Execution: User Execution: Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The critical ClamAV detection and the PDF_U3D_CVE_RELATED heuristic suggest exploitation of a vulnerability related to 3D content parsing in Adobe Reader. The embedded JavaScript, particularly javascript_obj0001_000.js, is likely responsible for executing the malicious payload, potentially involving obfuscation as suggested by the PDF_UNESCAPE firing and the EXTRACTED_FILE_STATIC_TRIAGE rule. The exact behavior of the JavaScript is not fully discernible due to potential obfuscation, but its presence within a CVE-related PDF structure points to an exploit delivery mechanism.

Heuristics 6

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` `846e02d4eb35a86d4ed85ab0c3c84f9084eda4151813823f25352123c7c97153`	pdf-javascript-stream	PDF /JS object 1 at offset 0xF	3571 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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