Malicious PDF — malware analysis report

Static analysis result for SHA-256 f68752768f70e392…

MALICIOUS

PDF

44.8 KB Created: 2021-06-03 07:16:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 295aba789562cd349631ed7e1ee14e0b SHA-1: c62d08090bfab22b26fe9494828f2df890b8050a SHA-256: f68752768f70e3921087e6aa55b29877fc8231ca13ec1365ffad96d509e3d43c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents a fake CAPTCHA or human verification prompt to trick the user into downloading a file, likely a malicious application. The embedded URL points to a resource that appears to be a hack or cheat for a game, further supporting the lure. No scripts were extracted, but the presence of external URIs and the fake CAPTCHA heuristic strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/406889139/coin-master-hack-apk-35-33-game-hack
    • https://sitecontabil.com.br/ckfinder/userfiles/files/minecraft-free-minecoins_GM479516143.pdf
    • https://sitecontabil.com.br/ckfinder/userfiles/files/coin-master-2021_GM406889139.pdf
    • https://sitecontabil.com.br/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdf
    • https://sitecontabil.com.br/ckfinder/userfiles/files/how-do-you-earn-robux-on-roblox_GM431946152.pdf
    • https://sitecontabil.com.br/ckfinder/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
    • https://sitecontabil.com.br/ckfinder/userfiles/files/get-free-spins-coin-master-2021_GM406889139.pdf
    • https://sitecontabil.com.br/ckfinder/userfiles/files/by-pubg-uc-free_GM1330123889.pdf
    • https://sitecontabil.com.br/ckfinder/userfiles/files/promo-code-free-robux_GM431946152.pdf
    • https://sitecontabil.com.br/ckfinder/userfiles/files/roblox-report-hacker_GM431946152.pdf
    • https://sitecontabil.com.br/ckfinder/userfiles/files/free-robux-microsoft_GM431946152.pdf
    • https://sitecontabil.com.br/ckfinder/userfiles/files/get-free-spins-coin-master-link_GM406889139.pdf
    • https://sitecontabil.com.br/ckfinder/userfiles/files/coin-master-hack-apk-april-12-2021_GM406889139.pdf
    • https://sitecontabil.com.br/ckfinder/userfiles/files/how-to-get-free-robux-without-downloading-anything_GM431946152.pdf
    • https://sitecontabil.com.br/ckfinder/userfiles/files/how-many-levels-are-in-coin-master_GM406889139.pdf
    • https://sitecontabil.com.br/ckfinder/userfiles/files/coin-master-hack-without-verification_GM406889139.pdf
    • https://sitecontabil.com.br/ckfinder/userfiles/files/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • https://sitecontabil.com.br/ckfinder/userfiles/files/free-coin-master-spins-daily_GM406889139.pdf
    • https://sitecontabil.com.br/ckfinder/userfiles/files/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdf
    • https://sitecontabil.com.br/ckfinder/userfiles/files/how-to-get-free-minecraft-coins_GM479516143.pdf
    • https://sitecontabil.com.br/ckfinder/userfiles/files/tiktok-free-videos_GM835599320.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f62.bin
084e28afdd2395141df731a43bcc4ff4bdd84bb1eb07eb0f944b2aa8bf3f2a0c
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F62 26584 bytes
font_01_sfnt_off00008c7c.bin
b2924f0237a3c0938d81e835a835fc5e0f49ca14d8df49d32683e5595cceebf6
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C7C 18200 bytes