Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e9c6cc4be004b1e…

MALICIOUS

PDF

45.5 KB Created: 2021-06-03 08:28:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a357d69e6fbe0dea2d830570f5aa9e65 SHA-1: 4fea737b6a31158eeb1a1c03871c896d34d3cc3f SHA-256: 6e9c6cc4be004b1ec358503f5290341b60b75f57876ac37011cc13affe94df2a
82 Risk Score

Malware Insights

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

The sample is a PDF document that displays a fake CAPTCHA, a common social engineering tactic to trick users into interacting with malicious content. It contains an embedded URI pointing to a URL that likely hosts a secondary 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.online/app/406889139/free-coins-and-spins-coin-master-2021-game-hack
    • http://elibrary.perludem.org/repository/pokemon-go-free-team-change_GM1094591345.pdf
    • http://www.elibrary.perludem.org/repository/i-got-hacked-on-roblox_GM431946152.pdf
    • http://elibrary.perludem.org/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdf
    • http://www.elibrary.perludem.org/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • http://elibrary.perludem.org/repository/coin-master-hack-apk-no-survey_GM406889139.pdf
    • http://elibrary.perludem.org/repository/spin-link_GM406889139.pdf
    • http://www.elibrary.perludem.org/repository/coin-master-cards_GM406889139.pdf
    • http://www.elibrary.perludem.org/repository/coin-master-hack-online-android_GM406889139.pdf
    • http://elibrary.perludem.org/repository/coin-master-34-4-hack_GM406889139.pdf
    • http://www.elibrary.perludem.org/repository/tiktok-fame-free_GM835599320.pdf
    • http://elibrary.perludem.org//repository/coin-master-hack-tool-access-online-generator_GM406889139.pdf
    • http://www.elibrary.perludem.org/repository/free-robux-net_GM431946152.pdf
    • http://elibrary.perludem.org/repository/free-promo-codes-for-roblox-2021_GM431946152.pdf
    • http://elibrary.perludem.org/repository/how-to-get-minecraft-java-for-free_GM479516143.pdf
    • http://elibrary.perludem.org/repository/minecraft-iphone-free_GM479516143.pdf
    • http://elibrary.perludem.org//repository/robux-page_GM431946152.pdf
    • http://elibrary.perludem.org//repository/free-robux-hack-us_GM431946152.pdf
    • http://elibrary.perludem.org//repository/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdf
    • http://www.elibrary.perludem.org/repository/coin-master-free-spin-and-coin-links_GM406889139.pdf
    • http://www.elibrary.perludem.org/repository/coin-master-hack-without-verification-code_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053ee.bin
eb09a5f777725f11dff76a83a1b8d917b7a5d69f0c4b1c8c34b3b5026b4a2a93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53EE 25620 bytes
font_01_sfnt_off00008ece.bin
871f0cb0a27f8e5dd89901f10b004c29658dd5d4ba968b8e0fec3a5b4bbe6c5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ECE 18460 bytes

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