Malicious PDF — malware analysis report

Static analysis result for SHA-256 93ad5ea9b33c7f07…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 19:42:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4681b6a224b67c2bca7c875dbeb0db1c SHA-1: c0dae09ad082e6e8a5a6105dfb94a4852a53fb11 SHA-256: 93ad5ea9b33c7f07f6eb2e887c86d4faf66907f20d32f5ff6d6ae666b43f8ac6
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for a "free generator / game hack" which redirects to a malicious URL. The document body, though heavily obfuscated, contains embedded URLs and references to game hacks, reinforcing the lure. The presence of a clipboard command lure suggests an attempt to trick the user into executing commands, likely to download and run a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/431946152/robux-2021-game-hack PDF link annotation
    • http://e-library.smkn1jombang.sch.id/repository/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-minecraft-website_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-minecraft-bedrock_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
stream_004_off00004efa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EFA 26972 bytes
SHA-256: d268e5cd8a2c738f4d68a5ed1773dd681ce90b1e615a7c037b5b4a8bbc1eb9db
font_01_sfnt_off00008d26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D26 18252 bytes
SHA-256: f22572533f4e8da48e03a48f0d29ce3544a01a0bd2cb3d9374f1b8b189e2707b

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