Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9d7450b935f8e8d…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 23:41:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c2c830a50e574a374337d87b0db51a9e SHA-1: 5359cd42660b5952d62cefb3ed137cbb6b63d079 SHA-256: b9d7450b935f8e8dafea6fb479da8321cf56153b682c3d81bb3c874acc5fde12
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/835599320/tiktok-free-view-quest-game-hack PDF link annotation
    • http://library.umla.ac.id//repository/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-spins-for-coin-masters_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-roblox-figures_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-roblox-injector_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/robux-all-codes-free-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-chip_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-doge-head-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-rare-cards-for-coin-master-christmas_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-spin-hack-pc_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-money-cheat-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-spin_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-free-robux-easy_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
font_00_sfnt_off00002feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FEB 21916 bytes
SHA-256: c88913ba1b1da147fbaac86a2772f6c66bede8ce5db93f47f52704d7dcd51387
font_01_sfnt_off0000605b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x605B 18568 bytes
SHA-256: b27ef97c075f0b579541fb38f4863af95f3c7e00f5bdd827ec5b5f039a5d3d15

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