Malicious PDF — malware analysis report

Static analysis result for SHA-256 91de1ea7737c242f…

MALICIOUS

PDF

43.4 KB Created: 2021-06-03 08:39:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0a3efc1e2e85067448e5769b438243d7 SHA-1: 06c1248a5af18aa152e8b5dc5d99047b593f42f8 SHA-256: 91de1ea7737c242f95b9692d5766da13352f25cf08d28b1b21493c7a9f9f127c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains links and a visual call-to-action designed to trick users into visiting a URL associated with game hacks. This URL, https://netcdn.online/app/406889139/coin-master-free-fire-game-hack, is likely to host or redirect to malicious content. The ML classifier also flagged this PDF as malicious with high confidence.

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/coin-master-free-fire-game-hack PDF link annotation
    • http://digilib.unla.ac.id/repository/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/latest-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/cm-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-inappropriate-games_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/watch-videos-for-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-do-you-get-free-robux-on-roblox_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
stream_004_off00004f32.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F32 24816 bytes
SHA-256: 7f81b4c2c92de7c7e496edaff5a9037eda4ad9016ae46bdf44bb1b28c1cfd3d4
font_01_sfnt_off000088af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88AF 17712 bytes
SHA-256: 0afd6f2792edb83b7f2a0201a1e0a5eb12ca81ad868fb3e42742340ee6e5fb0e

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