Malicious PDF — malware analysis report

Static analysis result for SHA-256 8958a75ea0e2e5c0…

MALICIOUS

PDF

34.8 KB Created: 2021-07-06 01:15:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: dd37749c0d72d54b9983a7c02fd8adf2 SHA-1: 4505276fe5239d1b546c97e176354717dc7f4185 SHA-256: 8958a75ea0e2e5c0b2056471e1a437b05074fc7c68c7375c93c9f1c3930e2a3c
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/free-spin-coin-master-2021-link-game-hack PDF link annotation
    • http://lib.uho.ac.id/library/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-stop-being-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/optifine-mcpe_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/easy-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/robux-win_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/robux-gratis_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/gain-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-online-2021_GM406889139.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_off00002fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FBA 23112 bytes
SHA-256: 4fb1f1406556965624bff504e39fa743404b4eeb81134bcdf92f805dd6823fd5
font_01_sfnt_off000063e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E8 18748 bytes
SHA-256: 87551c50e6d609f3c8aae9c53aca7d1ad4c281dc834da60ceb94801aa8be48ba

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