Malicious PDF — malware analysis report

Static analysis result for SHA-256 135cf1d96a7c8f00…

MALICIOUS

PDF

36.4 KB Created: 2021-06-30 08:48:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a3f6643661f8fa23e9e578e6619378e8 SHA-1: e8d6bb5c975dd9d4bfef369111e16535150bb499 SHA-256: 135cf1d96a7c8f0036ad70e2c30f61e3d62a8ddb9831c7cab3267e04d9fa8134
122 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a clipboard-command (paste-and-run) 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 0.9980

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/free-shirts-templates-non-copyrighted-roblox-game-hack PDF link annotation
    • http://www.otomasi.uinjambi.ac.id/repository/robux-game_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/gun-hack-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/how-to-exploit-roblox-without-cheat-engine_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/microsoft-roblox_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-hack-ios-12_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/play-roblox-fortnite-for-free_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/pc-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/jailbreak-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/how-to-install-minecraft-for-free-on-ios_GM479516143.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/tiktok-free-watermark_GM835599320.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/adidas-shirt-roblox-free_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_off00003342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3342 23012 bytes
SHA-256: 468f10e8fbfcecc50b9941ca3bf336b8ff9c023be3b398d9a1bd2a69a5a7cf41
font_01_sfnt_off00006717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6717 19828 bytes
SHA-256: 988bd5605c221046a65cad33a6dc569a82a6e368e68c0302e3f5ea6f8c8896e0

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