Malicious PDF — malware analysis report

Static analysis result for SHA-256 542c3305646b0378…

MALICIOUS

PDF

43.5 KB Created: 2021-05-16 23:08:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 75764c3cf1f7c813d27ebd1b9b89ae81 SHA-1: bb4c7ad15840496c97ebe2a4798654eb082e8e93 SHA-256: 542c3305646b0378a7985a6231292d24c7a7db3eb6857bee65b4474265e93b69
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document presents a fake CAPTCHA or human verification prompt to trick the user into interacting with it. It contains an external URI pointing to a URL that appears to be related to a game hack, suggesting a lure for potentially malicious downloads. The presence of multiple related URLs reinforces the phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.xyz/app/406889139/coin-master-daily-free-spins-and-coins-game-hack
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/how-many-levels-are-there-in-coin-master_GM406889139.pdf
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/toolbox-apk_GM479516143.pdf
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/free-spins-coin-master-without-completing-offers_GM406889139.pdf
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/hackear-coin-master-2021_GM406889139.pdf
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdf
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-coins-and-spins_GM406889139.pdf
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/free-coin-master-spins-and-coins-for-daily_GM406889139.pdf
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/minecraft-windows-10-hacks_GM479516143.pdf
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/minecraft-pe-hack-client_GM479516143.pdf
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdf
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/bloxpink-free-robux_GM431946152.pdf
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/robux-free-robux_GM431946152.pdf
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/free-minecraft-alts_GM479516143.pdf
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdf
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/roblox-hack-download-pc_GM431946152.pdf
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-fast_GM431946152.pdf
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdf
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/roblox-lawsuit_GM431946152.pdf
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-app-link_GM406889139.pdf
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-hacks-no-downloading_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e61.bin
498b9940916d699d723c5dd9523c8a7079180ae78a7c4b9e035c703b89f279b0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E61 25164 bytes
font_01_sfnt_off00008709.bin
323fea871d3154f9ddf991b22fd859b77165b4ee4e2d03de0fe4666202988bbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8709 18480 bytes

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