Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb424eb5438eb2fa…

MALICIOUS

PDF

36.4 KB Created: 2021-07-05 19:11:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 381f99fdba6dff9ab74aab00a4cd787a SHA-1: ed6da3a6610306e649edaab37907814118f3e9d7 SHA-256: fb424eb5438eb2faf8cdd080a7d99a5c71c7f9c7d92cec0bba235bd74fb0cd8a
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.tw/app/479516143/play-full-version-of-minecraft-for-free-no-download-game-hack PDF link annotation
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/is-minecraft-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/games-to-get-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/theme-park-tycoon-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/how-to-get-free-admin-in-every-roblox-game_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/coinmaster-spin-ml_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/win-free-robux-every-minute_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/que-hacer-cuando-te-hackean-la-cuenta-de-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/http-coin-master-hack-club_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/coin-master-collect-today-free-spin_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/coin-master-hack-using-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/get-free-spins-on-coin-master-2021_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_off00003678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3678 22640 bytes
SHA-256: beec7813ce31c531d49aae0765545e82e858252cf8c54f0369cb40503e98f429
font_01_sfnt_off000068f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68F5 19184 bytes
SHA-256: 5e32e363d8c65815c6d01de56cc06b1aeed3e4c2338534b38083fd982a037e53

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