Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dc0433d2188c2e8…

MALICIOUS

PDF

33.7 KB Created: 2021-06-30 07:24:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 38d62c04e30a25082735049381db4cbf SHA-1: ac499258652f254c874771ca26f1d142fa451a9a SHA-256: 1dc0433d2188c2e8ea82643daae6908ec7ec1cf5ae0333185aa30a70e1628bed
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links to external websites promising game hacks and free currency, a common lure for malware distribution. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it's a redirector for game hacks. While no scripts were directly extracted, the embedded URLs suggest the document's primary purpose is to redirect users to potentially malicious sites, likely leading to further exploitation or credential harvesting.

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/431946152/how-to-get-free-robux-no-scam-no-survey-game-hack PDF link annotation
    • http://autoskola-scp.com/files/roblox-free-vip-cheats_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-bc-hack-download_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/redeem-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/hack-roblox-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/forsaken-sword-legices-2-roblox-hack_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/master-coin-hack-mod_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-spins-coin-master-november-2021_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/kids-games-free-roblox-download_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/denis-free-admin-town-roblox_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/minecraft-tower-defense-2-hacked_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_off00002dda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DDA 21644 bytes
SHA-256: ef4fe5db697c71c01879c7396cae4e96598eb651bea6b4d65996755cec8679b1
font_01_sfnt_off00005d3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3B 19536 bytes
SHA-256: 1ccfae6a104b77acbf4bff99c7f2161f92d37466c77c19de45d69f6172c36fed

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