Malicious PDF — malware analysis report

Static analysis result for SHA-256 16dbaba940702e48…

MALICIOUS

PDF

42.6 KB Created: 2021-04-28 14:50:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c432fdc3ef2f0965b97bd52ba0603d22 SHA-1: 4bf9e245aecc99abbeb527cae060179b340b13d5 SHA-256: 16dbaba940702e483b54ef08971aed931cd38e071bb9b7acda5674a8090fe855
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains multiple URLs pointing to potentially malicious content, disguised as game cheats. The presence of a 'password-protected archive' heuristic suggests an attempt to evade detection by encrypting a payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9836

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/descargar-roblox-hack-2.397-game-hack PDF link annotation
    • http://www.saburai.ac.id/elibrary//repository/roblox-cheat-money-hack.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/hacks-to-get-robux-in-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-obby-gives-you-free-robux-july-no-password-2021.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-free-complete-game.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-roblox-wallpapers.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/infinite-money-hack-roblox-jailbreak.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/robux-free-co.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/get-a-free-dominus-from-roblox-toy.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-hack-999999-robux-movil.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-hack-in-roblox-wil-savannah.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3EBC 25380 bytes
SHA-256: dc8bd98bf51a057492f8c85921ba0d19dc3491514ae0d107b2bfa0e3262e601c
font_01_sfnt_off000077a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77A3 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00008154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8154 19220 bytes
SHA-256: ed3350413f36e0a790d49df171468b4f225504dd826a4bf079190e60208764aa

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