Malicious PDF — malware analysis report

Static analysis result for SHA-256 411f14c7905d6aa7…

MALICIOUS

PDF

45.3 KB Created: 2021-06-09 05:12:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2530b9461d42aa2f1e8a4159002d01c2 SHA-1: 08793b4f76616185299e515339fdd05958785062 SHA-256: 411f14c7905d6aa7864f8421df6f3dff0c7e6d0300618eaab90cae3fcf062588
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, which is a common social engineering tactic to trick users into interacting with malicious content. It also embeds an external URI pointing to a suspicious URL, likely intended to host or deliver a secondary payload. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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/hack-web-tools-roblox-game-hack
    • https://elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/free-spins-coin-master-facebook_GM406889139.pdf
    • https://elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/hackear-coin-master_GM406889139.pdf
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/minecraft-account-hacked_GM479516143.pdf
    • https://elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/best-free-minecraft-skins_GM479516143.pdf
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-daily_GM406889139.pdf
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/free-robux-2021_GM431946152.pdf
    • https://elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/free-robux-no-downloading-apps_GM431946152.pdf
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/how-to-coin-master-hack_GM406889139.pdf
    • https://elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/how-to-get-2021-robux-for-free_GM431946152.pdf
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/free-robux-no-verification-at-all_GM431946152.pdf
    • https://elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/roblox-hacks-discusion_GM431946152.pdf
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/mcpe-com_GM479516143.pdf
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/free-robux-mod_GM431946152.pdf
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/rich-free-roblox-accounts_GM431946152.pdf
    • https://elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/open-coin-master_GM406889139.pdf
    • https://elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/daily-coin-master-spins_GM406889139.pdf
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/coin-master-2021-free-spins-link-today_GM406889139.pdf
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/good-free-minecraft-server-hosting_GM479516143.pdf
    • https://elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/freerobuxhack-us_GM431946152.pdf
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/ways-to-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005309.bin
4ee546bc86b6f2528189d8ed2ccc50ddcd948dc1cdf52ad542b43bf3a17800fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5309 25400 bytes
font_01_sfnt_off00008df8.bin
72c1f6b789a1e9f87a8b53ca3593e89bd7e28e0c281aaaa0abcbe82a84d94de6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF8 18380 bytes

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