Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfcb33a2ad8e09d7…

MALICIOUS

PDF

48.9 KB Created: 2021-06-09 03:40:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0e53b074207b0286c13f12af45b51dd7 SHA-1: bec0319b4c55a9e6ca16e83163eba0c0d2e243a2 SHA-256: dfcb33a2ad8e09d78d3bfd56c1967c5c80a18842f602e329052a99c10ebc224b
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 0.9796

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 https://netcdn.tw/app/431946152/free-robux-codes-not-used-2021-july-game-hack PDF link annotation
    • http://fkunismuh.org/perpustakaan/repository/coin-master-hack-apk-download-latest-version_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/optifine-mcpe_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-apk-mod-coin-master_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/daily-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/flamegg-hack-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/is-tiktok-free-app_GM835599320.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-minecraft-website_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coinmasterhack-club_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-get-free-robux-in-roblox-without-a-generator_GM431946152.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_off000053c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53C5 25720 bytes
SHA-256: fb636a89801d2195be7653e40c687146259d4f5ac73d6e17d083c7fdaa0f814d
font_01_sfnt_off00008f83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F83 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00009935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9935 19300 bytes
SHA-256: 996f5c3bf1609a33c5991dcec113f21a0f6dbfac6118b1cfedb45b1f3d261327

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