Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bcc2b9cfdb93b3e…

MALICIOUS

PDF

45.3 KB Created: 2021-06-09 05:02:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6bbac5e44a265b766f3cfc6dd03e6c95 SHA-1: 09f1cbd0814c1475e3cd75785f3db6c5fad978a3 SHA-256: 1bcc2b9cfdb93b3e45e5eb6d44db4ac41397d6347cfa0ef190835855326a8a6c
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to trick users into downloading further malicious content, as indicated by the 'SE_FAKE_CAPTCHA' heuristic. The embedded URL points to a resource likely intended to host or distribute the payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/roblox-tower-battles-hacked-game-hack
    • http://ellobo.com.ua/ckfinder/userfiles/files/robuxhub-net_GM431946152.pdf
    • http://ellobo.com.ua/ckfinder/userfiles/files/critical-strike-hacks-roblox_GM431946152.pdf
    • http://ellobo.com.ua/ckfinder/userfiles/files/robux-matchcomfree-robux_GM431946152.pdf
    • http://ellobo.com.ua/ckfinder/userfiles/files/online-hacking-tricks-coin-master_GM406889139.pdf
    • http://ellobo.com.ua/ckfinder/userfiles/files/how-to-script-roblox-games-hacking_GM431946152.pdf
    • http://ellobo.com.ua/ckfinder/userfiles/files/minecraft-xbox-one-code-free_GM479516143.pdf
    • http://ellobo.com.ua/ckfinder/userfiles/files/coin-master-free-spins-link-today-instagram_GM406889139.pdf
    • http://ellobo.com.ua/ckfinder/userfiles/files/cute-free-roblox-clothes_GM431946152.pdf
    • http://ellobo.com.ua/ckfinder/userfiles/files/coin-master-free-coins-and-spins-daily_GM406889139.pdf
    • http://ellobo.com.ua/ckfinder/userfiles/files/free-draw-roblox_GM431946152.pdf
    • http://ellobo.com.ua/ckfinder/userfiles/files/carte-roblox-free_GM431946152.pdf
    • http://ellobo.com.ua/ckfinder/userfiles/files/all-coin-master-spin-link-and-free-download_GM406889139.pdf
    • http://ellobo.com.ua/ckfinder/userfiles/files/coin-master-apk-hack-download_GM406889139.pdf
    • http://ellobo.com.ua/ckfinder/userfiles/files/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • http://ellobo.com.ua/ckfinder/userfiles/files/rbxoffers-earn-free-robux_GM431946152.pdf
    • http://ellobo.com.ua/ckfinder/userfiles/files/how-to-get-robux-with-cheat-engine-63_GM431946152.pdf
    • http://ellobo.com.ua/ckfinder/userfiles/files/minecraft-games-online-free-no-download_GM479516143.pdf
    • http://ellobo.com.ua/ckfinder/userfiles/files/roblox-e-free_GM431946152.pdf
    • http://ellobo.com.ua/ckfinder/userfiles/files/get-free-likes-on-tiktok_GM835599320.pdf
    • http://ellobo.com.ua/ckfinder/userfiles/files/coin-master-cards-free-cards_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051cc.bin
b04c12e45bbad0e6e07b632d59f0ed4b243368f2c1fadc9632e3af5bc8f26922
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51CC 25388 bytes
font_01_sfnt_off00008d3b.bin
3506358eb5fc5f0a37efc2ee0b7a326bc75fe1bc024e81c4205436eef6b61c8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D3B 18624 bytes