Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6d76189b5931bc7…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 13:39:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5d714906dfd53aa6fbb31158b4975e87 SHA-1: 45374817064757a58a9578d59627c06625c718b6 SHA-256: f6d76189b5931bc7669c2a7570bd148bf424bd1d8e5498e181f8ae556319fb74
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/479516143/how-to-get-minecraft-for-free-on-xbox-one-game-hack PDF link annotation
    • http://digilib.unbari.ac.id/repository/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-change-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/trouver-la-partie-dun-joueur-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/tiktok-likes-free_GM835599320.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/does-john-doe-actually-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-can-i-earn-robux-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-games-with-no-anti-cheat_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-lumber-tycoon-2-hack-tool_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-character-edit-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-cheat-engine-66_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/daily-coin-master-free_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-cheat-in-yin-vs-yang-ninja-assassin-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/hack-explosion-roblox-pizza-place_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-free-coins-link-2021-deutsch_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/today-free-spin-link-for-coin-master_GM406889139.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_off0000312e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x312E 22224 bytes
SHA-256: 39eaf54e727d0c05387622af131d6e8ef070b615abd17a94856b0e22d0b3b25f
font_01_sfnt_off00006276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6276 18756 bytes
SHA-256: d5ec30f65413d7db6993b9641d1e97629dc650179ebea3b1673208637b129ed3

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