Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d4a46e087e5fdc8…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 05:38:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8963a0d4d594e1a1fa7ec1a58432a061 SHA-1: 45fbf65d630a96ffe723a8c088a336cd339d8c40 SHA-256: 3d4a46e087e5fdc85405dd08b08cd051ef39b003ce6002a084b7277552efc52e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a high-severity heuristic indicating it links to a 'free generator / game hack' redirector. The embedded URL, http://netcdn.tw/app/406889139/coin-spin-link-game-hack, is the primary indicator of malicious intent. The document body, though partially garbled, contains similar URLs and text suggesting a lure for online game cheats or currency. No scripts were extracted, but the overall pattern suggests a phishing or scam attempt to redirect users to a potentially harmful site.

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-spin-link-game-hack PDF link annotation
    • http://fkunismuh.org/perpustakaan//repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-bubble-gum-sim-hack_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/hacking-into-ldshadowladys-roblox-account_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-boys-shirts-roblox-codes_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/can-u-actually-hack-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/raindrop-roblox-hack_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-hack-mcpe-master-coins_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/e-free-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-robux-no-tsts_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-hack-admin-commands-on-roblox-android_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/boxing-simulator-roblox-infinite-strength-hack_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
stream_002_off0000307f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x307F 22928 bytes
SHA-256: c03fbc5797030e70b571a7acaab08ca5bcae9884def04d4a177bc30c62d6ed5b
font_01_sfnt_off00006407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6407 18076 bytes
SHA-256: 28c3bbbb127f0926d8e21afd24f58e7e1c0ea518f1d6266cc8eb2e2b41c2b2be

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