Malicious PDF — malware analysis report

Static analysis result for SHA-256 a243fc1d89e9fe81…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 14:17:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f999f876bd93a28e223a7a212131e84a SHA-1: d4d3e6354d2d43b857e1010fb6f173c9ba4c7d21 SHA-256: a243fc1d89e9fe81fe83c1e0b6b22b54027597deaeb0d1a96df94931bae5033e
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/minecraft-building-hacks-game-hack PDF link annotation
    • http://lib.icbc-indonesia.org/repository/how-to-cheat-health-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-map_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-resources-hack_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-daily-free-coins-link_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/hunting-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-hacked-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-spins-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-get-the-mew-game-pass-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/will-tiktok-free-view-bot_GM835599320.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-giant-survival-hack_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-code-for-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-roblox-gift-card-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/hack-sharkbite-roblox_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_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_off000030df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30DF 22284 bytes
SHA-256: ad599dd88cf7fb1c90ab6c1df6281600a12f82f10c1751a3c88b1dc6a714ab3c
font_01_sfnt_off00006272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6272 18628 bytes
SHA-256: 03be4b6b10a4c687c6c89c16a3bf013511456428a76c01e3ee63370f4522cf94

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