Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2d4b8e5604824ee…

MALICIOUS

PDF

32.6 KB Created: 2021-07-03 15:56:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1ced33852dd79c78e3d0b5e28d9e89a1 SHA-1: b24faf4a6f44caa8595fe727e996d52a3d481791 SHA-256: b2d4b8e5604824ee186471ecd560914d13fccf6c2b95fa7c4225f17f55311274
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing for linking to a 'free generator / game hack' redirector, specifically http://netcdn.tw/app/479516143/create-minecraft-server-free-game-hack. This lure is designed to trick users into clicking the link, likely to download malware or exploit a vulnerability. The ML classifier also strongly flagged this PDF as malicious.

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/create-minecraft-server-free-game-hack PDF link annotation
    • https://sensorcamera-tw.com/upload/files/roblox-visit-bot-free-trial_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/robux-hack-2021-phone_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/www-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/epic-free-robux_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-pin-numbers-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-mster-free_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/reddit-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/robux-cheat-codes-2021_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-free-spin-redeem-code_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-cool-free-outfits_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/robuxian-free-robux_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_off00002fe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE2 20988 bytes
SHA-256: 3e82dc36db4d3463d89df7814377ddecbfd0209f634ed9d7012ef7f2563f79f2
font_01_sfnt_off00005d86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D86 17968 bytes
SHA-256: 8862e0fd8d2cab3005f580dff2cd7c982356054071a32259706c613b74bd5842

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