Malicious PDF — malware analysis report

Static analysis result for SHA-256 4189e18d9590efc9…

MALICIOUS

PDF

33.7 KB Created: 2021-07-05 02:48:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 69d3ccd06baa3d2b6a72563d6e631b75 SHA-1: 799317c80b4863adf5793a9424c38687d1ccc254 SHA-256: 4189e18d9590efc974824b014c7c9e2e5d5b6eed3a4b195f1700909547c95b7a
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/431946152/free-robux-gen-game-hack PDF link annotation
    • https://library.iuli.ac.id/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/adopt-me-roblox-money-hacks_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/alphalife-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-rewards_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-unused-roblox-codes_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-robux-hack-generator-club-no-human-verification_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-hack-tool-download-2021_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-get-free-robux-without-downloading-games_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/cruise-ship-tycoon-roblox-money-cheat_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-roblox-dominus-codes_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/descargar-hack-para-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-unlimited-robux-cheat_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/hack-robux-2021-sin-verificacion-humana_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-robux-generator-may-2021_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-find-free-items-in-roblox-catalog_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-list-of-roblox-accounts_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_off00002e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E77 22060 bytes
SHA-256: 549e0bb10b3c4cd5950791173a05042187fc02ab71b386df8c695e7865cb0ed2
font_01_sfnt_off00005f7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7E 18716 bytes
SHA-256: 241c7495b7b7869825a77847e0d47c1d78029990e0b32ebb48689777b4105741

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