Malicious PDF — malware analysis report

Static analysis result for SHA-256 f898ca8ee67b6f75…

MALICIOUS

PDF

60.0 KB Created: 2021-06-03 10:14:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: bb9ff5278e02f9116f4bf0d6991870e4 SHA-1: 8b87b27e4635aed26267b7c3267937129ca653e1 SHA-256: f898ca8ee67b6f758d5e0c480e6ee6cf839af02e2dc6645e39caf3d044e5430d
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 0.9457

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 https://netcdn.online/app/406889139/coin-master-free-spins-links-app-game-hack PDF link annotation
    • http://e-library.akbid-purworejo.ac.id//repository/robux-earning-sites_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/how-to-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/free-roebucks_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/tiktok-free-3d-model_GM835599320.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-free-spins-link-deutsch-ios_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/coin-master-raid-hack_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-game-free_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/rbx-com_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/coin-master-download-hack-ios_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005479.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5479 31100 bytes
SHA-256: 02727fa6f78e49e6c240afb262cdf66b6c57a6762cdff50db4e9d88685be0731
font_01_sfnt_off00009bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BFE 3180 bytes
SHA-256: 2d00068860a708e1b658da426f6f6d584e8c43c120b2e4a13a0776e1f1bcde5d
font_02_sfnt_off0000a730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA730 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000ba55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA55 18056 bytes
SHA-256: 82bd5e5fc9f9c8e10db102fb3f3c15aafc022ab197dd07e70821ea88e25dcd6f
font_04_sfnt_off0000dba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA0 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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