Malicious PDF — malware analysis report

Static analysis result for SHA-256 c423a578451a94ba…

MALICIOUS

PDF

33.6 KB Created: 2021-07-04 11:47:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 4a3d8e50b5e801c123d47eaa57d548b2 SHA-1: 41bd0cd3911fa4c2f01ffda4c6162438a55de6af SHA-256: c423a578451a94baeb3e142cd583a1b1a32bcd0eb4c3b5a0c8ed24e7d8f047ad
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/431946152/scary-larry-roblox-game-hack PDF link annotation
    • http://e-library.smkn1jombang.sch.id/repository/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/roblox-hack-scripts-2021_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-roblox-promoodes_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-roblox-characters_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-daily-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/follower-fr-tiktok-free_GM835599320.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/robux-win_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/how-to-log-out-of-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/completed-coin-master-hack_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_off00002e09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E09 22164 bytes
SHA-256: 2e0b2e889dd6586abb5aa33089457b31535420b80d6591f320f550cc75035293
font_01_sfnt_off00005f32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F32 18668 bytes
SHA-256: b25a534296075f7bcdc7d208e3295736962a1ae35fe22db08908c3a21747a7bc

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