Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e5bcccfa93c478f…

MALICIOUS

PDF

40.7 KB Created: 2021-04-29 07:46:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 0e3d8565c6aec6efdd804d8aa2225b55 SHA-1: e8e7835e4e0a7ee55dcbbda8a0c18df9df33fa9e SHA-256: 8e5bcccfa93c478fb162b9807da09cee01feb08b8ff8ae85e9eee9557e240d4e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links and a visual call-to-action button, masquerading as "Roblox Catalog Hacks". The primary external URI, https://netcdn.xyz/app/431946152/roblox-catalog-hacks-thumbnail-game-hack, is associated with a brand-impersonation credential phishing lure, specifically impersonating Chase bank. The document body, though heavily obfuscated, contains references to Roblox and hacking, further supporting the lure. No scripts were extracted, but the presence of multiple malicious URLs indicates a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/roblox-catalog-hacks-thumbnail-game-hack.
  • 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 https://netcdn.xyz/app/431946152/roblox-catalog-hacks-thumbnail-game-hack PDF link annotation
    • http://boliviagasenergia.com/images/how-to-get-items-in-roblox-for-free.pdfIn PDF document text
    • http://boliviagasenergia.com/images/free-robux-no-human-identification.pdfIn PDF document text
    • http://boliviagasenergia.com/images/free-admin-roblox-games.pdfIn PDF document text
    • http://boliviagasenergia.com/images/roblox-free-hats-exploit.pdfIn PDF document text
    • http://boliviagasenergia.com/images/how-to-hack-to-get-free-robux-2021.pdfIn PDF document text
    • http://boliviagasenergia.com/images/how-to-get-free-robux-easy-1-munuit.pdfIn PDF document text
    • http://boliviagasenergia.com/images/how-do-you-make-a-shirt-free-on-roblox.pdfIn PDF document text
    • http://boliviagasenergia.com/images/im-hack-you-roblox-id.pdfIn PDF document text
    • http://boliviagasenergia.com/images/clothes-that-are-free-on-roblox.pdfIn PDF document text
    • http://boliviagasenergia.com/images/robuxy-com-free-robux-generator.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000041b0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x41B0 24636 bytes
SHA-256: 7bff5fa88960a76803695d406f3a717005e921e6111123fc55c707a8460d13f7
font_01_sfnt_off00007a60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A60 19260 bytes
SHA-256: bd06a7d4c3f38494a2850b9649e7dce29f5bbf35dcb8d664411786b1ad8e0f3c

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