Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c91973087ab650c…

MALICIOUS

PDF

34.4 KB Created: 2021-06-19 15:01:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a02de19ef4ac1facc48408fd1d123ffe SHA-1: 31b123a72ad4fb4fa36f28d8b596c10dfb08596d SHA-256: 8c91973087ab650c0015c00dc5790cf1d86144198c9cb445b41031719020a07d
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.co/app/431946152/free-robux-generator-no-waiting-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id//repository/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-red-hoodie-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/info-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-mod-menu_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/kid-cheats-on-roblox-girlfriend_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/blogger-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-spins-11-01-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-roblox-app_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/como-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-mod-free-download_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-in-roblox-comm_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E9C 22584 bytes
SHA-256: d5ec40236ef685681e8b2da5c75f5b2e5e5c42821de242f93f695a4b421482e0
font_01_sfnt_off000060f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F5 19136 bytes
SHA-256: 3cccf3acb8a82ab4a62a56dd0d8b9b6f87a6babdcdd9a44857167acf80750552

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