Malicious PDF — malware analysis report

Static analysis result for SHA-256 97d11820fe2c4e1b…

MALICIOUS

PDF

227.0 KB Created: 2021-07-03 12:42:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0c98ec8cc99b8976f02a4e0c95ba687a SHA-1: 6acf3a1c48ed6fdb4b8b8a99fc184fed82f19634 SHA-256: 97d11820fe2c4e1ba86b07364e6bc66240e9929c821543c4b3106438ba405c9b
132 Risk Score

Malware Insights

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

The file presents itself as a lure for a game download or hack, employing social engineering tactics like a fake CAPTCHA and a download button. It directs the user to a URL hosted on 'netcdn.tw' which is likely to serve a malicious payload or facilitate further compromise. The document's content and heuristics strongly suggest a phishing or malware distribution attempt.

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-game-download-game-hack
    • http://library.unissula.ac.id/fk/repository/free-roblox-catalog-items-2021_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/can-u-get-insta-banned-in-roblox-for-hacking_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/hackear-roblox-escape-prison-traspasar-las-paredes_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/roblox-pro-hack-script_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/free-robux-giveaway_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/pokemon-go-free-and-verizon_GM1094591345.pdf
    • http://library.unissula.ac.id/fe/repository/how-to-get-free-robux-for-no-cost_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/how-do-you-hack-roblox_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/hack-coin-master-nyc_GM406889139.pdf
    • http://library.unissula.ac.id/fe/repository/minecraft-games-online-free-no-download_GM479516143.pdf
    • http://library.unissula.ac.id/fe/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/sentinel-roblox-hack_GM431946152.pdf
    • http://library.unissula.ac.id/fk//repository/free-coin-master-spins-2021_GM406889139.pdf
    • http://library.unissula.ac.id/fe/repository/free-coin-coin-master_GM406889139.pdf
    • http://library.unissula.ac.id/fk//repository/how-to-get-free-robux-no-human-verification_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/rbxboost-com-free-robux_GM431946152.pdf
    • http://library.unissula.ac.id/fk//repository/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdf
    • http://library.unissula.ac.id/fk//repository/free-spins-coin-master_GM406889139.pdf
    • http://library.unissula.ac.id/fk/repository/roblox-mafia-cloth-free_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/free-spin-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_023_off00031f75.bin
82477cb77df4890f8ba1fb64fab8e8a2a6a8dac6310b033101b35402d82e469f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31F75 25576 bytes
font_01_sfnt_off00035b79.bin
667064e0b4847b37a2eb2e4a0e39fa153da9322880542b9ca75c68c1d3347b64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x35B79 18940 bytes

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