PDF malware analysis — malicious · c312331b7233e9ea

MALICIOUS

PDF

4.7 KB

MD5: 69c63fedba318049eeca678a18eac6cb SHA-1: 6f39fc4f46d715bbe106a9e96a7441a0589f9cf0 SHA-256: c312331b7233e9eaece608ee1ef0b07587fd8d5c66feaad713233f97e4603b40

158 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, which is obfuscated and uses an unescape() call. This JavaScript is likely responsible for exploiting a vulnerability related to U3D/3D content in Adobe Reader, indicated by the 'PDF_U3D_CVE_RELATED' heuristic. The ClamAV detection 'Heuristics.PDF.ObfuscatedNameObject' further supports the malicious nature of the file. The primary IOC is the extracted JavaScript file, which is expected to contain the exploit code.

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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0001_000.js` `494695ada11b200f57995411b439068ff27ec9813546694667a4cae25370cb25`	pdf-javascript-stream	PDF /JS object 1 at offset 0xF	1936 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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