Malicious PDF — malware analysis report

Static analysis result for SHA-256 aef2432bc74bd04c…

MALICIOUS

PDF

226.5 KB Created: 2021-07-04 05:46:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e7bde6989191bab239ccfb00be743135 SHA-1: 6a95f33fab53d11918fdb1278d965ea8e88d7ab0 SHA-256: aef2432bc74bd04c58e7d8c7f72214194ca490517b42013f76245807bf6cd76b
132 Risk Score

Malware Insights

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

The PDF document employs social engineering tactics, including a fake CAPTCHA and a call-to-action, to lure users into visiting a malicious URL. This URL, http://netcdn.tw/app/1094591345/pokemon-go-free-gifts-game-hack, is likely intended to deliver a payload or facilitate further compromise, such as installing a fake browser extension. The heuristics indicate a pattern of user deception for malicious purposes.

Machine Learning

  • Nyx PDF Classifier clean score 0.0118

Heuristics 6

  • 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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/1094591345/pokemon-go-free-gifts-game-hack
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/how-to-roblox-script-hack_GM431946152.pdf
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/easy-robux-com_GM431946152.pdf
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/how-to-get-free-robux-and-it-actually-works_GM431946152.pdf
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/coin-master-free-food_GM406889139.pdf
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/hack-place-roblox_GM431946152.pdf
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/roblox-google-play-free-items_GM431946152.pdf
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/make-free-robux_GM431946152.pdf
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/how-to-hack-other-accounts-in-roblox_GM431946152.pdf
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/como-hackear-cuentas-de-roblox-gratuitas_GM431946152.pdf
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/free-spins-coin-master-hack-2021_GM406889139.pdf
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/free-minecraft-hosting_GM479516143.pdf
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/play-minecraft-free-online-no-download_GM479516143.pdf
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/wwwfree-face-on-robloxcom_GM431946152.pdf
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/robux-hack-no-human-verification_GM431946152.pdf
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/can-i-get-free-robux_GM431946152.pdf
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/rbxfree-com-free-robux_GM431946152.pdf
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/roblox-hack-aimbot-download_GM431946152.pdf
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/no-human-verification-coin-master-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_023_off00031ed3.bin
ba3e3f919d6b3cbd11c7963bc668b827e93741f55739081b725dddb44a72a584		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31ED3 25576 bytes
font_01_sfnt_off00035ad9.bin
cecfc7ad4f978f53f31796d31d4c128adc755998b1aa457acbc32f6f6626af2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x35AD9 18584 bytes

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