Malicious PDF — malware analysis report

Static analysis result for SHA-256 394387bdd28372d6…

MALICIOUS

PDF

227.6 KB Created: 2021-07-04 11:34:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 670b6fe7e4ea541ab3a3cbc126d45367 SHA-1: 9a4d7a54f46b1644d6599e1927e92814d3536796 SHA-256: 394387bdd28372d6c45bea9dd5761e1a4268d047e73a44669b415a421ef36cf1
132 Risk Score

Malware Insights

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

The document employs social engineering tactics by presenting a fake CAPTCHA and a browser extension installation lure to trick users into executing malicious actions. It also contains external URIs pointing to potentially malicious content, suggesting a download or credential theft attempt. No scripts were extracted from this sample, limiting the ability to determine specific payload delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier clean score 0.0117

Heuristics 6

  • 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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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 http://netcdn.tw/app/1094591345/pokemon-go-3-free-raid-passes-game-hack
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/roblox-cheat-robux_GM431946152.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/roblox-is-bieg-hacked_GM431946152.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/ways-to-get-free-robux_GM431946152.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/coin-master-free-spins-a2z-help_GM406889139.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/coin-master-hack-2021-without-verification_GM406889139.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/free-script-executor-roblox-2021_GM431946152.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/wall-hack-roblox-2021_GM431946152.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/coin-master-hack-version-2021-download_GM406889139.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/free-24-7-minecraft-server_GM479516143.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/roblox-free-robux-no-verification_GM431946152.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/free-spin-coin-master-new-link_GM406889139.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/pokemon-go-free-daily-spawn_GM1094591345.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/roblox-how-to-get-free-faces_GM431946152.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/free-robux-hack-2021_GM431946152.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/i-want-to-break-free-roblox-versin_GM431946152.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/roblox-ccount-crcker-free-v3million_GM431946152.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/coin-master-hack-spins-android_GM406889139.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/coin-master-free-daily-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_023_off00032256.bin
58ee6f28a224c0b9d5a0253fb651fce7e6a01d55ce7dc94a22825e75d76ed0d2		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32256 25576 bytes
font_01_sfnt_off00035e52.bin
3bea6a8c11d56e8e399f9d24cccc255330e75584ddf70de5fa2d1071ddca6836		 pdf-font-stream PDF embedded font (sfnt) at offset 0x35E52 18824 bytes

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