Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4bf60ea5044a9a4…

MALICIOUS

PDF

33.4 KB Created: 2021-07-04 02:38:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 432cf9519e2a0df831011b15d8b6031d SHA-1: 180a22d3c52ea22a0be31d80d22809dd5fccf7b8 SHA-256: f4bf60ea5044a9a4b14cfb2b0a0668282e6b1708f2fce0e8a69b818620783eda
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 0.9824

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/free-robux-just-click-game-hack PDF link annotation
    • http://lc.pustaka.unand.ac.id/repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/roblox-hack-download-pc-2021_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/does-roblox-premium-expire_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-robux-group_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/roblox-freebies-hack-robux_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/roblox-free-roam-camera_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/coin-master-hack-no-root_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/how-to-hack-boku-no-roblox-to-get-legendary-quirks_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/roblox-how-to-get-free-followers_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/how-to-hack-fe-games-roblox-v3r_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/coin-master-hack-download-2021_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_off00002a20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A20 22780 bytes
SHA-256: 61bf5236c695bff38d5d8f47d47145d223b2912a3e01565402d1b9f1cdf1b94f
font_01_sfnt_off00005cfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CFA 19348 bytes
SHA-256: 8163eefe55d2b716894bab3fbbbe5b67835ea43b9ee71dd429e67fe46c72f214

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