Malicious PDF — malware analysis report

Static analysis result for SHA-256 98a451f2e38d50bf…

MALICIOUS

PDF

43.1 KB Created: 2021-05-16 13:30:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c1263bd3d6d29c3998da8d76b1645cc0 SHA-1: d99b98f713e3473924647ff391e76a2ea1dd55c2 SHA-256: 98a451f2e38d50bffcd941ceff6125f74b6c78542fdf23e3ad3f8226feb7c409
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document exhibits characteristics of a phishing or scam lure, employing a fake CAPTCHA and a recovery secret request to deceive users. It contains numerous external links, including one pointing to 'https://netcdn.xyz/app/431946152/free-robux-hack-2021-game-hack', suggesting a redirection to a malicious site. The presence of a PDF link farm further indicates an attempt to generate traffic or distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/431946152/free-robux-hack-2021-game-hack
    • http://livebybuddhism.org/images/games-like-coin-master-for-free_GM406889139.pdf
    • http://livebybuddhism.org/images/show-me-how-to-get-free-robux_GM431946152.pdf
    • http://livebybuddhism.org/images/ways-to-get-robux_GM431946152.pdf
    • http://livebybuddhism.org/images/coin-master-cheats-free_GM406889139.pdf
    • http://livebybuddhism.org/images/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdf
    • http://livebybuddhism.org/images/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • http://livebybuddhism.org/images/earn-robux-today-earn-robux-today_GM431946152.pdf
    • http://livebybuddhism.org/images/free-robux-generator-2021-no-human-verification_GM431946152.pdf
    • http://livebybuddhism.org/images/coin-master-hack-apk-33-download_GM406889139.pdf
    • http://livebybuddhism.org/images/free-robux-real-2021_GM431946152.pdf
    • http://livebybuddhism.org/images/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://livebybuddhism.org/images/roblox-points_GM431946152.pdf
    • http://livebybuddhism.org/images/free-spins-and-coins-for-coin-master-game_GM406889139.pdf
    • http://livebybuddhism.org/images/how-can-you-get-free-robux_GM431946152.pdf
    • http://livebybuddhism.org/images/free-robux-com-no-verification_GM431946152.pdf
    • http://livebybuddhism.org/images/roblox-com-games-referrer-roblox-player_GM431946152.pdf
    • http://livebybuddhism.org/images/coin-master-rewards-free-spins_GM406889139.pdf
    • http://livebybuddhism.org/images/free-robux-generator-no-survey_GM431946152.pdf
    • http://livebybuddhism.org/images/minecraft-story-mode-free_GM479516143.pdf
    • http://livebybuddhism.org/images/free-robux-clothes_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048cd.bin
9b1eebdf7f035bb4c46ddc0d369bd66ad73ea8c89b36832bac5edf42685b5081		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48CD 26448 bytes
font_01_sfnt_off00008478.bin
b2e74e066e927f416452387fe7118a02e4882588ce64a473b0bf6318b488dee0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8478 18816 bytes

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