Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9c7ae1e5a69d971…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 04:15:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 4f3e29dce77488d79420efad1cbfb0f2 SHA-1: 6dda61ce81be483ec929729b186dccc1ef8c4aa8 SHA-256: f9c7ae1e5a69d971256161ac61692d6074e00a1f3d081dd99ccd75d2efbd2ed7
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/406889139/coin-master-spin-hack-2021-game-hack PDF link annotation
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-level-3_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/minecraft-nintendo-switch-digital-code-free_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/dragon-ball-fury-hack-roblox-script_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/minecraft-net-free_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-robux-codes-generator-no-virus_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/hack-murder-mystery-roblox-a-telecharger-gratuitement_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/red-boy-hack-roblox-descargar_GM431946152.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_off00003272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3272 23064 bytes
SHA-256: b1092e6f64ef8a6866705f3c32228a8b1ff2ede849bca46f97e5cb522a4f2cb3
font_01_sfnt_off00006663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6663 18580 bytes
SHA-256: 63d6adc7563b485c3174704ac8a7a6a262dc9bf1deaf17837918a23c7f43ebb5

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