Malicious PDF — malware analysis report

Static analysis result for SHA-256 81b295871764e63c…

MALICIOUS

PDF

44.5 KB Created: 2021-06-04 04:56:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c45ddf204a6327e53405f06a28004906 SHA-1: e902503d1efe72ca692fe27cf589c78e21b1aa8f SHA-256: 81b295871764e63c830785d7a220c8b74d8929dd23cf7a60477466b83640f0b6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for a "game hack" and "free spins" which redirects to the malicious URL https://netcdn.online/app/406889139/50-free-spins-coin-master-links-game-hack. This URL is likely hosting a malicious payload or further phishing content. The document also contains multiple other PDF links that appear to be part of a similar lure campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/406889139/50-free-spins-coin-master-links-game-hack PDF link annotation
    • http://www.perpusffup.or.id/repository/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/getrobux-now_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/coin-master-hack-apk-download-latest-version_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/cmaster-club-coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/coin-master-hack-unlimited-spins-game-download_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051d0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51D0 25520 bytes
SHA-256: 3c76abaf0303c10c3771730115d0690db7c6b0bdc946fa734a5fab1f49db20b2
font_01_sfnt_off00008b06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B06 18364 bytes
SHA-256: 5f18526dee368ac18b20cf023ba1ff49340788242d54a3837ea53eed50d07245

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