Malicious PDF — malware analysis report

Static analysis result for SHA-256 f72c25f00c372788…

MALICIOUS

PDF

35.6 KB Created: 2021-07-03 11:37:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6607160e01b4c9ec6f62665d0da4c115 SHA-1: c4fcd4f29cabe64bf39ab1223fc408ac04afc108 SHA-256: f72c25f00c372788d43d0107f711010934eb7983ebeebb3cdc123aabba1c7c73
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-vip-hack-game-hack PDF link annotation
    • http://library.stiks-tarakanita.ac.id/repository/mistplay-hack-robux_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/free-robux-website-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/free-tiktok-likes-no-survey_GM835599320.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/how-to-search-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/roblox-free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/roblox-dayz-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/how-to-spawn-stuff-in-roblox-using-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/minecraft-free-app_GM479516143.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
stream_002_off0000339d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x339D 23376 bytes
SHA-256: b6d3eed148c7be7fbe92817aba11eb0691930048d9ee3dcc5ea0053f48c609fe
font_01_sfnt_off0000687c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x687C 18312 bytes
SHA-256: 0a7f80164f47993a31654aa5e92e367b06b27cea90ecf05ee4853a688796fefb

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