Malicious PDF — malware analysis report

Static analysis result for SHA-256 98d0cd62e7b6946b…

MALICIOUS

PDF

44.5 KB Created: 2021-05-15 07:02:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1a93dc72f86b9a99f58e663e7eed0838 SHA-1: 88f8bd91452876ff6d77f2e2e7862094ca421c45 SHA-256: 98d0cd62e7b6946b105bde35c5919e760e25c9dd55e578b814167bd0c4cf2d4b
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.9632

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.xyz/app/406889139/coin-master-gift-link-hack-game-hack PDF link annotation
    • https://www.campguru.co.za/images/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • https://www.campguru.co.za/images/minecraft-maps-pe-free-download_GM479516143.pdfIn PDF document text
    • https://www.campguru.co.za/images/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.campguru.co.za/images/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • https://www.campguru.co.za/images/free-vip-server-roblox_GM431946152.pdfIn PDF document text
    • https://www.campguru.co.za/images/coin-master-gold-cards-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.campguru.co.za/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.campguru.co.za/images/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.campguru.co.za/images/haktuts-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.campguru.co.za/images/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • https://www.campguru.co.za/images/roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.campguru.co.za/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.campguru.co.za/images/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • https://www.campguru.co.za/images/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • https://www.campguru.co.za/images/coin-master-freebies_GM406889139.pdfIn PDF document text
    • https://www.campguru.co.za/images/free-spin-link-of-coin-master_GM406889139.pdfIn PDF document text
    • https://www.campguru.co.za/images/roblox-font-free_GM431946152.pdfIn PDF document text
    • https://www.campguru.co.za/images/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • https://www.campguru.co.za/images/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • https://www.campguru.co.za/images/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bfb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BFB 24548 bytes
SHA-256: fa54d9646aa143f72e72f38113b82cac333e50d6fc232f11c693d384fab10d98
font_01_sfnt_off0000835b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x835B 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008d0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D0D 17716 bytes
SHA-256: e1491a72d2c7431630ffc6d787b93bb08da7918aa93baa4fe3434e3e11ca7bef

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