Malicious PDF — malware analysis report

Static analysis result for SHA-256 648b3cb6d6d1c659…

MALICIOUS

PDF

35.9 KB Created: 2021-06-27 08:15:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 701e7e4ddd99ec21fb1345b4e22210d1 SHA-1: 58264229b132996cc85f1b1e8eb8b254a6d8aa88 SHA-256: 648b3cb6d6d1c659750e1d9e3139866f50048ec66bc12e5ac449a22412ab97f5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document displays a fake CAPTCHA and includes a call-to-action to trick users into clicking a link. The embedded URL, 'http://netcdn.co/app/431946152/how-to-get-free-robux-2021-no-verification-game-hack', likely leads to the download of a second-stage payload. The document's content and heuristics strongly suggest a phishing or social engineering attack aimed at users seeking in-game currency or cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-to-get-free-robux-2021-no-verification-game-hack
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/roblox-rape_GM431946152.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/pubg-uc-200_GM1330123889.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/hack-coin-master-32-mod-apk_GM406889139.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/free-coins-for-planet-master-game_GM406889139.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/coin-master-card-hack-2021_GM406889139.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/coin-master-hack-game-download-ios_GM406889139.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/tiktok-free-view-pro-app-download_GM835599320.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/real-robux-codes_GM431946152.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/free-robux-only-username-no-human-verification_GM431946152.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/get-coin-master-free-spin_GM406889139.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/roblox-free-clothes-download_GM431946152.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/roblox-free-play-no-download_GM431946152.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/free-10-roblox-gift-cards_GM431946152.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/free-robux-hack-no-human-verification-and-no-survey-2021_GM431946152.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/roblox-shard-seekers-how-to-cheat-engine-shards_GM431946152.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/free-minecraft-account-and-password_GM479516143.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-groups_GM431946152.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/free-roblox-gift-card-codes_GM431946152.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/roblox-account-taker_GM431946152.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/just-go-to-mobihack-robloxhack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003441.bin
4bbd9f503b7862a05c8ee97d74afcb0351aeda7f8e9011d759f5eb00fdf48436		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3441 22168 bytes
font_01_sfnt_off0000659e.bin
7965df129908c031ed8ae4e9ae846e53c9f4599b8ba6d31bf1393a532139d77b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x659E 19640 bytes

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