Malicious PDF — malware analysis report

Static analysis result for SHA-256 c720efac98f715e7…

MALICIOUS

PDF

45.6 KB Created: 2021-05-13 09:30:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 004e1332f3a2b844efe8fb9b8b4e37f5 SHA-1: c008a15bf20131ec0d70c940a9fa604b4bf8a696 SHA-256: c720efac98f715e77816aec9cca74dd130db91dd2e9b909a096eb20f4b7f95fb
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 https://netcdn.xyz/app/431946152/how-to-get-free-robux-2021-game-hack PDF link annotation
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/coin-master-hack-app-link_GM406889139.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/krnl-roblox_GM431946152.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/robux-free-2021_GM431946152.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-grom-coin-master_GM406889139.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/free-100-robux_GM431946152.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/coin-master-tiradas-gratis_GM406889139.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/archery-master-3d-coins-hack_GM406889139.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-today_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
stream_003_off00004ce2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CE2 28528 bytes
SHA-256: ade404c748e07f3459c9ee8b243d374bf4658ca7bd537eefc783208580823486
font_01_sfnt_off00008eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EBA 18684 bytes
SHA-256: 662354714a7c4aa127b8bd681013e9d5d113fbfc5a2f5afb2d34764175bb04a5

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