Malicious PDF — malware analysis report

Static analysis result for SHA-256 31e1109dae81f864…

MALICIOUS

PDF

45.3 KB Created: 2021-06-04 03:03:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 83c3fcb4f156758286f5962b4068fe54 SHA-1: 63e4feb1cac261987f7d9e057262f2a508cf5a76 SHA-256: 31e1109dae81f86491ada69f9c85f0d3691cf14d15d2fa4b2393ac90e3677e6a
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 0.9864

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 https://netcdn.online/app/479516143/how-to-get-free-tokens-in-minecraft-ps4-game-hack PDF link annotation
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/minecraft-free-exe_GM479516143.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/can-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/cheats-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-hack-online-pc_GM406889139.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/robux-prices_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-hack-app-ios_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_004_off00005375.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5375 26972 bytes
SHA-256: a1d3d2acb096e5fca8ed465b4a6b758c601c045d47d51d4066ec835ce46704a8
font_01_sfnt_off00008e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E9B 18260 bytes
SHA-256: 6b17d904edba380b1c0a1521f110ced755ab41ddc916bfb976523684f5146024

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