Malicious PDF — malware analysis report

Static analysis result for SHA-256 b086efa706e8a2c8…

MALICIOUS

PDF

7.3 KB Authoring application: Bofatezozinefaxfa (via a8baeVogewojixariuawi)
MD5: 76868315e14bf48b6dadc45856c2c0d4 SHA-1: df58551146a6b7f8c76891a8c8a1390ab8d19356 SHA-256: b086efa706e8a2c86b9ccf524d344fb6820d6a61ddc722857d6bdbd512b46bc1
76 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF containing obfuscated JavaScript, as indicated by the 'PDF_JAVASCRIPT' and 'PDF_JS' heuristic firings, and a critical ClamAV detection for 'Heuristics.PDF.ObfuscatedNameObject'. The embedded JavaScript is likely designed to exploit a vulnerability within the PDF reader to execute arbitrary code. The presence of JavaScript actions and streams strongly suggests an attempt to download and execute a secondary payload.

Heuristics 3

  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0011_000.js
ca838ab153ea9de4fff1e74bdd0848fd720f71bc6fbee4425be234136cd19b41
pdf-javascript-stream PDF /JS object 11 at offset 0x1349 2325 bytes