Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f9b5fb237466e7a…

MALICIOUS

PDF

35.0 KB Created: 2021-07-03 15:07:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 24ba26934d76e7bd792daa1273dc1399 SHA-1: 95de87ec3525ab4c680c72162ee0b82b8ec251e8 SHA-256: 2f9b5fb237466e7a9db4d2fe13d1f7f69dda1415b7baf1c43712e863873fd2fa
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 0.9980

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 http://netcdn.tw/app/479516143/how-to-install-minecraft-for-free-on-ios-game-hack PDF link annotation
    • https://che.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://che.itk.ac.id/asset/backend/upload/ckeditor/files/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • https://che.itk.ac.id/asset/backend/upload/ckeditor/files/lapeceratonta-roblox-tycoon-hacked_GM431946152.pdfIn PDF document text
    • https://che.itk.ac.id/asset/backend/upload/ckeditor/files/general-roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://che.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-hack-for-synapse-x_GM431946152.pdfIn PDF document text
    • https://che.itk.ac.id/asset/backend/upload/ckeditor/files/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://che.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-studio-free-templates_GM431946152.pdfIn PDF document text
    • https://che.itk.ac.id/asset/backend/upload/ckeditor/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://che.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • https://che.itk.ac.id/asset/backend/upload/ckeditor/files/jak-zrobici-za-free-postaci-w-roblox_GM431946152.pdfIn PDF document text
    • https://che.itk.ac.id/asset/backend/upload/ckeditor/files/wurst-112_GM479516143.pdfIn PDF document text
    • https://che.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-youtubecom_GM431946152.pdfIn PDF document text
    • https://che.itk.ac.id/asset/backend/upload/ckeditor/files/earn-robux-gg-earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://che.itk.ac.id/asset/backend/upload/ckeditor/files/hacks-for-hole-in-the-wall-roblox_GM431946152.pdfIn PDF document text
    • https://che.itk.ac.id/asset/backend/upload/ckeditor/files/comment-hacker-bird-simulator-dans-roblox_GM431946152.pdfIn PDF document text
    • https://che.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-jump-hack-script_GM431946152.pdfIn PDF document text
    • https://che.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://che.itk.ac.id/asset/backend/upload/ckeditor/files/freerobuxklub_GM431946152.pdfIn PDF document text
    • https://che.itk.ac.id/asset/backend/upload/ckeditor/files/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://che.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-instantly_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_off000033c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33C4 22832 bytes
SHA-256: 93f94c6dfceee9fd6b9843ddd5b9f4ac85451ab9a75e0bb8a3343ab05f150894
font_01_sfnt_off00006657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6657 18236 bytes
SHA-256: cba65744f6023630f7311c2b4bd519b673a5f0450d6bb7a8c935eaa4ac90cea4

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