PDF malware analysis — malicious · 273d40bf8ee1a19b

MALICIOUS

PDF

5.4 KB

MD5: afd4ebc278190a5ad040710db01552ed SHA-1: 7a10e9ac2fac7ff358a32c599ae851b1baafd573 SHA-256: 273d40bf8ee1a19b544d27101beae0db3521348f547bc3e07fc990786c09a499

158 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains obfuscated JavaScript streams, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of unescape() calls and U3D content related to CVEs suggests an attempt to exploit vulnerabilities. The ClamAV detection 'Heuristics.PDF.ObfuscatedNameObject' further confirms malicious intent. The embedded JavaScript files are the primary indicators of malicious activity, likely serving to download and execute a secondary payload.

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` `2fe0ff34304844763174931175c1b078749c5c0e15ecfea9c66e82290a80b6ff`	pdf-javascript-stream	PDF /JS object 1 at offset 0xF	3486 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 0xF1D	58 bytes

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