Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbcc2b8633ccaaf7…

MALICIOUS

PDF

69.6 KB
MD5: 21e606128ce84f19e75d9166987e9276 SHA-1: ba287ec3b38423823b91db92b4e2fb9b0e657c51 SHA-256: bbcc2b8633ccaaf7e1cbf72f66722f026e34d16ac5c168022391c04862ec6da1
76 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ClamAV detection for Heuristics.PDF.ObfuscatedNameObject further supports its malicious nature. The embedded JavaScript stream, javascript_obj0012_000.js, is likely responsible for executing malicious actions, such as downloading a second-stage payload from the known malicious URL http://www.bitstream.com. The document body is heavily obfuscated and does not provide clear user-facing content.

Heuristics 4

  • 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.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.bitstream.com

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0012_000.js
484efb4368ef124dcb2ddeca7d39627562d724e5d36ef17bd30e0034dd75795a		 pdf-javascript-stream PDF /JS object 12 at offset 0x10618 3631 bytes

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