Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d5dbaa4713c14cd…

MALICIOUS

PDF

32.9 KB Created: 2021-07-03 20:24:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2f962ac03cb40fcd4b0c401118aea40b SHA-1: 15a143707a6c4f37d02cfef577f0a6aba875379b SHA-256: 8d5dbaa4713c14cd90fa9e2108cc095c2aabd85c659fb4616983bdb5ae2e0145
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/minecraft-bedrock-free-server-hosting-game-hack PDF link annotation
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/free-flip-master-coins_GM406889139.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/how-to-get-robux_GM431946152.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/how-to-hack-peoples-roblox-accounts_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_off00002e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E6B 21356 bytes
SHA-256: 14c4357df33988a14f5c1f65e7d4d10d76fc62a0e4fbedc80c2b35628c6dc1f4
font_01_sfnt_off00005cc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC0 18672 bytes
SHA-256: 5baa597ceebb7173861118a54c9708b38703675a1839245e0c8f4bf1dfc6d3a9

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