Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab42aeca99b4936e…

MALICIOUS

PDF

43.9 KB Created: 2021-05-12 18:38:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b1e869a06553741498c2e4d851e97026 SHA-1: bd4e87376964ced53c6247ff8cdeb3ae9404ab30 SHA-256: ab42aeca99b4936e2188eb953d95e93b5a1fb9696fac25dd7cd06aed0bc7dc06
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a fake CAPTCHA lure, designed to trick the user into interacting with the document. It also embeds external URLs, one of which, https://netcdn.xyz/app/431946152/microsoft-roblox-game-hack, is likely a download link for a malicious payload. The ML classifier strongly flagged this PDF as malicious, supporting the observed social engineering tactics.

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/431946152/microsoft-roblox-game-hack
    • http://apostolosandreaslemesou.com/images/free-roblox-dominus_GM431946152.pdf
    • http://apostolosandreaslemesou.com/images/free-roblox-adopt-me-pets_GM431946152.pdf
    • http://apostolosandreaslemesou.com/images/coin-master-free-spins-link-today_GM406889139.pdf
    • http://apostolosandreaslemesou.com/images/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • http://apostolosandreaslemesou.com/images/free-robux-no-password_GM431946152.pdf
    • http://apostolosandreaslemesou.com/images/hacks-to-get-free-robux_GM431946152.pdf
    • http://apostolosandreaslemesou.com/images/minecraft-free-install_GM479516143.pdf
    • http://apostolosandreaslemesou.com/images/fb-coin-master_GM406889139.pdf
    • http://apostolosandreaslemesou.com/images/free-spins-coin-master-app_GM406889139.pdf
    • http://apostolosandreaslemesou.com/images/how-to-buy-robux-for-free_GM431946152.pdf
    • http://apostolosandreaslemesou.com/images/offers-for-robux_GM431946152.pdf
    • http://apostolosandreaslemesou.com/images/coin-master-hack-ios-reddit_GM406889139.pdf
    • http://apostolosandreaslemesou.com/images/coin-master-free-spins-link-2021-march_GM406889139.pdf
    • http://apostolosandreaslemesou.com/images/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdf
    • http://apostolosandreaslemesou.com/images/roblox-booga-booga-hack_GM431946152.pdf
    • http://apostolosandreaslemesou.com/images/archery-master-3d-apk-and-mod-free-download-unlimited-coins_GM406889139.pdf
    • http://apostolosandreaslemesou.com/images/coin-master-hack-unlimited-spins-and-coins-cheats_GM406889139.pdf
    • http://apostolosandreaslemesou.com/images/how-to-get-free-robux-no-human-verification_GM431946152.pdf
    • http://apostolosandreaslemesou.com/images/robloxbux-us-generator_GM431946152.pdf
    • http://apostolosandreaslemesou.com/images/coin-master-hack-ios-12_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b50.bin
30cef841f43de46ce2406a2bec8914725943e162f07a8e163d4ecb3260568905		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B50 26932 bytes
font_01_sfnt_off00008997.bin
2b7eeff572d04ab457d9e2a35520a79c61ee30861b9713b02bf411d46f2ac039		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8997 18204 bytes

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