Malicious PDF — malware analysis report

Static analysis result for SHA-256 516f2e4e9054d7f6…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 01:03:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 33906c5236276af386d431ed743df85f SHA-1: c0e4aeca8904c5ff583ffe0b2c249e7a04fe64c5 SHA-256: 516f2e4e9054d7f61cf16e09f35ff4b06b60a5f0b270491912a07b02740d8232
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a lure for a "Coin Master Hack" which redirects to a malicious URL. This indicates an attempt to trick the user into visiting a potentially harmful site, likely to download further malware or engage in credential harvesting. The ML classifier also strongly flagged this PDF as malicious.

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-master-hack-2021-no-human-verification-game-hack PDF link annotation
    • http://lib.uho.ac.id/library/repository/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/hack-coin-master-dzooka_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/tiktok-free-likes-app_GM835599320.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-eat-or-diy-game-hack_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-invite-friends-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-cheats-for-phone_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/pokemon-go-free-app_GM1094591345.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-free-cards-sets-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-hack-coin-master-game-without-verification_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/robux-app_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/wurst-client_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-shields-coin-master_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_off000030dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30DC 22696 bytes
SHA-256: 61981ad756ccaff657c7c6f963450b4663fe17c31f4fd193dd1f196c8795be22
font_01_sfnt_off000063b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B9 18940 bytes
SHA-256: 8b81128e4d8c0a52c4f795b94b8e9f316ec6df4c85cd77aec984460d7bda85ab

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