PDF malware analysis — malicious · 25513e70a4d25d45

MALICIOUS

PDF

5.7 KB

MD5: 9b7e3e68aa8532abf61c9b085176c451 SHA-1: 74b3cefde5e75fd2cea3d7eb64f80fa3804e6be9 SHA-256: 25513e70a4d25d45fc04f38cefded61ce6c272174a81339e69184ef4a78d245d

158 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The presence of PDF_U3D_CVE_RELATED suggests exploitation of a vulnerability related to Adobe Reader's 3D parsing capabilities. The JavaScript stream, particularly javascript_obj0001_000.js, is likely responsible for executing the malicious payload. The ClamAV detection Heuristics.PDF.ObfuscatedNameObject further supports the malicious nature of the file. The exact behavior of the JavaScript is not fully discernible due to obfuscation, but it is highly probable that it downloads and executes a second-stage 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` `152cf02709b2b7eba65b0aee008e8605afdb83200ef06625e8ae4fe75216a8bc`	pdf-javascript-stream	PDF /JS object 1 at offset 0xF	3755 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 0x1037	58 bytes

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