Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c049aac76ac8e3e…

MALICIOUS

PDF

36.3 KB Created: 2021-07-04 10:29:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 34b499bb9f8304faf1d67d8d0eeb93e2 SHA-1: e866984713b7f1261bc634a3bfa878f226058a9d SHA-256: 4c049aac76ac8e3ed58a31ef5bfaa3a23d661f0e4a6f92f5334845287a17e215
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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://netcdn.tw/app/406889139/coin-master-free-spin-link-today-50-game-hack PDF link annotation
    • http://lib.untad.ac.id/repository/roblox-give-game-pass-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-the-future-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/lazyblox-com-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/minecraft-pocket-edition-download-free-pe-calculator_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-online-game_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/cheats-for-roblox-prison-life-20_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-free-username-changer_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/nisterv-free-robux-hack-youtube_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-hack-client-pc-download_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-promocodes-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hacker-web-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-roblox-account-generator_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-groups_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/unlockmygamescom-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/pokemon-go-free-app-download_GM1094591345.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hacks-for-roblox-high-school_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/minecraft-hacks-18-9_GM479516143.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
font_00_sfnt_off000034b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34B9 23308 bytes
SHA-256: 95551b0349846c5116a787a9c817b6054cce762ec8ef879ee48be35d0c8451e7
font_01_sfnt_off0000692a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x692A 19004 bytes
SHA-256: 5daa20baea943ad033d284ccbcba05b83926cb46defdb1dfb92cae0a7ff2faa5

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