Malicious PDF — malware analysis report

Static analysis result for SHA-256 b404d019a53db785…

MALICIOUS

PDF

33.6 KB Created: 2021-07-01 03:13:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7cfe7f78b9815b69343087c3000130b8 SHA-1: 42af4a9d17098d5060af2a313d9c218827c9c4a9 SHA-256: b404d019a53db7857d242713e188bd34d44cfef6c1695d6310cca8658cedae26
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a game hack lure, specifically referencing 'Coin Master Daily', to entice users to click on a malicious URL. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the embedded URL 'http://netcdn.co/app/406889139/coin-master-daily-game-hack' strongly indicate a social engineering tactic. While no scripts were extracted, the document's structure and embedded links suggest it is designed to redirect users to a site that likely hosts malware or phishing content.

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.co/app/406889139/coin-master-daily-game-hack PDF link annotation
    • https://limebug.com/media/storage/editor/files/how-to-get-free-robux-through-ads_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-roblox-girl-clothes-codes_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-aimbot-free-download_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-assassin_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-please_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-cheats-free_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-roblox-gift-card-codes-2021-may_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-stuff-on-roblox-glitch_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/robuxglobalcom-no-verification_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_off00002eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EED 22256 bytes
SHA-256: e14beb28f164715d026fc3b7c7c4c75128351fd143d2dd09bc19f4c0a291f1cd
font_01_sfnt_off0000606a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x606A 18256 bytes
SHA-256: e5d2ae62ab428ccdde8c51a6c881ab5f3030241469dbfaa385cbaf7884f98516

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