Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc570960444356c8…

MALICIOUS

PDF

45.5 KB Created: 2021-05-17 17:30:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0b08191029e77608338e0f7aa4e56da7 SHA-1: 0a3a71f5a658c78bf68d69c23a4df0da25ccdc25 SHA-256: bc570960444356c8b28c82574ca069ce362ed1c2fbee4afff55821c7d8d1c6e9
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 0.9507

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/games-on-roblox-that-give-you-free-robux-game-hack PDF link annotation
    • http://elearningmi.mibustanululumtulungagung.com/__statics/gudangsoal/files/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearningmi.mibustanululumtulungagung.com/__statics/gudangsoal/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://elearningmi.mibustanululumtulungagung.com/__statics/gudangsoal/files/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://elearningmi.mibustanululumtulungagung.com/__statics/gudangsoal/files/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://elearningmi.mibustanululumtulungagung.com/__statics/gudangsoal/files/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://elearningmi.mibustanululumtulungagung.com/__statics/gudangsoal/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://elearningmi.mibustanululumtulungagung.com/__statics/gudangsoal/files/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • http://elearningmi.mibustanululumtulungagung.com/__statics/gudangsoal/files/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://elearningmi.mibustanululumtulungagung.com/__statics/gudangsoal/files/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://elearningmi.mibustanululumtulungagung.com/__statics/gudangsoal/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elearningmi.mibustanululumtulungagung.com/__statics/gudangsoal/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://elearningmi.mibustanululumtulungagung.com/__statics/gudangsoal/files/robux-robux_GM431946152.pdfIn PDF document text
    • http://elearningmi.mibustanululumtulungagung.com/__statics/gudangsoal/files/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://elearningmi.mibustanululumtulungagung.com/__statics/gudangsoal/files/hack-coin-master-1_GM406889139.pdfIn PDF document text
    • http://elearningmi.mibustanululumtulungagung.com/__statics/gudangsoal/files/coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://elearningmi.mibustanululumtulungagung.com/__statics/gudangsoal/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elearningmi.mibustanululumtulungagung.com/__statics/gudangsoal/files/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://elearningmi.mibustanululumtulungagung.com/__statics/gudangsoal/files/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • http://elearningmi.mibustanululumtulungagung.com/__statics/gudangsoal/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://elearningmi.mibustanululumtulungagung.com/__statics/gudangsoal/files/hacker-minecraft-song_GM479516143.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_off00004c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C45 24388 bytes
SHA-256: 5a4a11abe3c5b0a31aa4e42b60b3439317c490e4f4099c0cb53b3b8caabae6aa
font_01_sfnt_off000082e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82E7 2820 bytes
SHA-256: d88f25cfe237a714f996150a11dd8a058f0f7c3e9d1ae91c17b46c10409b6c0b
font_02_sfnt_off00008c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C82 19240 bytes
SHA-256: 3009583106c638257969d16940e6b1d2d6c9c8cef99a9d3856a451b20885bf07

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