Malicious PDF — malware analysis report

Static analysis result for SHA-256 903d78be7f33ec37…

MALICIOUS

PDF

48.1 KB Created: 2021-06-03 23:02:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 938742384541e92faae4d6fce7c023f4 SHA-1: b5d55a9642517c6bacdd69b4b82f1aefaf7fe916 SHA-256: 903d78be7f33ec37afdffb3e11dd5124eb314de442c6cb85716d8b962a2ce49e
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 0.9796

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/431946152/how-to-make-free-robux-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id//repository/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-unlimited-spins-and-coins-cheats_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-do-i-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-coin-master-stuff_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/get-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/toolbox-apk_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/blox-rewards_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/demon-roblox_GM431946152.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
stream_004_off000053d8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53D8 25224 bytes
SHA-256: 790a4a5741e884b97d3c8914c38c6e7067f8a8b4f46ca5a924ba3254c674c064
font_01_sfnt_off00008e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E11 2844 bytes
SHA-256: d4efd49219a7ff6424c923a6ccef5b7e1750ded18bbd79546f2ad196ddc76c43
font_02_sfnt_off000097d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97D1 18772 bytes
SHA-256: bc975d0cd3d1d09474d4302e54d359df6d5266f7e81f0636855fd998b44c4aca

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