Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe57786278e9797e…

MALICIOUS

PDF

234.8 KB Created: 2021-04-04 19:36:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c3165fd5b624690cc69e66567e3a44ce SHA-1: d794c15c45d73b3df1027df971b39e823f957e49 SHA-256: fe57786278e9797e36bf665da2529d6a5ee9742234c946a5ea5cee58e2110a03
72 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a critical ClamAV detection for 'Pdf.Phishing.Roblox062100-9873116-0', indicating a known phishing variant. It also includes an external URI pointing to a 'robux hack code generator', reinforcing the phishing lure. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs. No scripts were extracted, but the presence of a malicious URL and the ClamAV signature strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier clean score 0.0491

Heuristics 4

  • ClamAV: Pdf.Phishing.Roblox062100-9873116-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Roblox062100-9873116-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://gaminggenerator.org/app/431946152/unpatchable-robux-hack-code-generator PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00035655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35655 21524 bytes
SHA-256: bcc4c47a949460d90a2dda9aa9d4fb93b553bf297029a2834b83a64e51f3500f
font_01_sfnt_off00038570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x38570 18660 bytes
SHA-256: bca5fe66f7596f1db65c12fb6c159f4e920f22cb37b8c8c9a1f341474d6dfc13

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