Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ba2cdbf41ba4246…

MALICIOUS

PDF

6.4 KB
MD5: 1b976b50eac8b1599cd4ab850a80b9e0 SHA-1: 6d725a406e2322ef377b96178e67ac6b54442cda SHA-256: 9ba2cdbf41ba4246238a05d43a4e48f7786934c175e3718b555b992d65fc90f4
158 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings related to PDF JavaScript and unescape functions. The presence of U3D/3D content and a ClamAV detection for 'Heuristics.PDF.ObfuscatedNameObject' strongly suggests exploitation of a vulnerability within Adobe Reader's 3D parsing capabilities. The embedded JavaScript is likely responsible for executing the malicious payload, potentially leading to further compromise.

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.

FilenameKindSourceSize
javascript_obj0001_000.js
073bb88891691456e494409c1e27212a5bcca86552c415c71a5d99a29d573b69		 pdf-javascript-stream PDF /JS object 1 at offset 0xF 4808 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 0x12CB 58 bytes

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