Malicious PDF — malware analysis report

Static analysis result for SHA-256 d28efa450288b991…

MALICIOUS

PDF

44.5 KB Created: 2021-06-04 00:09:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bc8f6debbd99ee500c2d271416f3cb6b SHA-1: db7d5c09053c7214c24b638ec73a5c4c4ba66ca3 SHA-256: d28efa450288b991836ee708962199d8c5332eae5bb4c66509d3b74b1b2844d8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9865

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/431946152/how-to-get-free-robux-youtube-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/microsoft-bing-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/minecraft-kill-aura_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/como-hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-games-with-free-boombox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-email-rewards_GM406889139.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_off0000525e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x525E 24496 bytes
SHA-256: c8d26611d3b0fecf6315d9144c1c37e3d503ee975e58d740a8e35a29e021f6aa
font_01_sfnt_off00008aad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AAD 18444 bytes
SHA-256: c8869677d4d84c4518e8410e1128de6ae04a76f8db213e07b668dd1668cda2fe

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