Malicious PDF — malware analysis report

Static analysis result for SHA-256 830138d7b14a2c54…

MALICIOUS

PDF

46.6 KB Created: 2021-06-03 06:02:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7219264d8847eb3adf67e8503426bafb SHA-1: 3552262e88e649aa988d7f3c656745c38b3acff8 SHA-256: 830138d7b14a2c54492571ac6766dfd3f1ff0b69fb6900acb3911bac523f68e7
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 clicking a malicious link. This link, 'https://netcdn.online/app/431946152/how-to-get-free-robux-without-human-verification-game-hack', likely leads to the download of a secondary malicious payload. The presence of multiple similar URLs suggests a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.online/app/431946152/how-to-get-free-robux-without-human-verification-game-hack
    • http://www.perpus.stfm.ac.id/repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdf
    • http://perpus.stfm.ac.id/repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdf
    • http://perpus.stfm.ac.id/repository/oginject-co_GM406889139.pdf
    • http://perpus.stfm.ac.id/repository/how-to-get-free-robux-promo-codes_GM431946152.pdf
    • http://www.perpus.stfm.ac.id/repository/minecraft-apk-114_GM479516143.pdf
    • http://perpus.stfm.ac.id/repository/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
    • http://www.perpus.stfm.ac.id/repository/rbl-gg-free-robux_GM431946152.pdf
    • http://perpus.stfm.ac.id/repository/https-rbx-place-rewards_GM431946152.pdf
    • http://perpus.stfm.ac.id/repository/free-robux-without-doing-anything_GM431946152.pdf
    • http://perpus.stfm.ac.id/repository/roblox-hack-download-pc_GM431946152.pdf
    • http://perpus.stfm.ac.id/repository/free-minecraft-client_GM479516143.pdf
    • http://www.perpus.stfm.ac.id/repository/free-robux-without-verify_GM431946152.pdf
    • http://perpus.stfm.ac.id/repository/free-spin-link-for-coin-master_GM406889139.pdf
    • http://perpus.stfm.ac.id/repository/rbxdemon_GM431946152.pdf
    • http://www.perpus.stfm.ac.id/repository/minecraft-java-edition-key-free_GM479516143.pdf
    • http://www.perpus.stfm.ac.id/repository/coin-master-hack-extension_GM406889139.pdf
    • http://www.perpus.stfm.ac.id/repository/www-rbxhut-com_GM431946152.pdf
    • http://perpus.stfm.ac.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdf
    • http://perpus.stfm.ac.id/repository/free-robux-for-free_GM431946152.pdf
    • http://perpus.stfm.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005227.bin
99ba103154b00d370664ab01fc5843b67eb74511e214eb578df106dedda8fe94		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5227 26604 bytes
font_01_sfnt_off000090aa.bin
c7994a70f951e7a274445218605a0e5dad46067da7d3a89c75279f94e76bcfde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90AA 19388 bytes

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