Malicious PDF — malware analysis report

Static analysis result for SHA-256 67fa7e43ff5bbc88…

MALICIOUS

PDF

34.1 KB Created: 2021-07-19 08:05:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 8e9f26ec0e26d73a4e589a9912a1e0ea SHA-1: 6caf625604835ccbd346b4a6d26779f9d5b9b27b SHA-256: 67fa7e43ff5bbc888af88339f7578985a0eb5e1580f00393fe5099283c173f9b
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 0.9955

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-free-coins-and-spins-game-hack PDF link annotation
    • https://corbo.ru/images/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://corbo.ru/images/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • https://corbo.ru/images/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • https://corbo.ru/images/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • https://corbo.ru/images/try-minecraft-free_GM479516143.pdfIn PDF document text
    • https://corbo.ru/images/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • https://corbo.ru/images/free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://corbo.ru/images/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • https://corbo.ru/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://corbo.ru/images/minecraft-apk-free-download_GM479516143.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_off00003008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3008 23120 bytes
SHA-256: 352ab43dbbf7ee5d0deab6931bea22a5804788e5496b073a4ae5c94b1e78add0
font_01_sfnt_off00006424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6424 18060 bytes
SHA-256: f77ee24e01944806ea28e16fd73427a54f7109e241804df06ce657d8c6d11cfb

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