Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdc9b1392843fced…

MALICIOUS

PDF

35.2 KB Created: 2021-07-03 16:06:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: af5331ce7ccd7201d53d6886e66fdf49 SHA-1: d7bbc92f961ff0ba35129c8779162992c8222ce2 SHA-256: bdc9b1392843fced29332e2dd13b41eeb9d4f6b22d2f25a10d26ad01313ed0f0
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/835599320/free-tiktok-followers-quick-and-easy-game-hack PDF link annotation
    • http://lib.uho.ac.id/library//repository/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/minecraft-116-1-download_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-book-collection_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/hack-de-robux-rapido_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-account-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/accesories-hacks-royale-high-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-food-for-pet_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/download-coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-play-online-free_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
font_00_sfnt_off00003286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3286 22596 bytes
SHA-256: aca463b9c35ecfb10c51ae980a905dbe1dd2532026b320d2bf834f567f3568d1
font_01_sfnt_off000064fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64FA 18860 bytes
SHA-256: e1722a02de48079b1e0704957d2bc14472a6e910568ef417d75a170ee225aa3a

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