Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba02aef3be98269b…

MALICIOUS

PDF

44.7 KB Created: 2021-06-08 15:00:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3832d0a7028ae0b35542d920977ff821 SHA-1: 066e8a4382ae789e26a4a8bcc23eb5f0a60b259a SHA-256: ba02aef3be98269b29df502ec84c799c1d3075252692b8f91f4b2a0ce439072a
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure and embedded URLs, strongly suggesting a phishing or scam attempt. The document body and extracted URLs promote 'free Robux' and 'Coin Master' rewards, indicating a lure for game-related scams. The ML classifier also flagged this PDF as malicious with high confidence.

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.tw/app/431946152/how-to-get-free-robux-easy-2021-on-computer-game-hack PDF link annotation
    • https://repository.poltekkesgorontalo.ac.id/repository/ww-roblox-come_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/coin-master-daily-free-rewards_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/aimbot-download-roblox_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/how-do-i-get-free-robux-without-installing-apps_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/fake-robux-codes_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/minecraft-packs-free_GM479516143.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-roblox-toys_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/cheat-shower-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-links-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/download-coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/coin-master-code-hack_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e33.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E33 25536 bytes
SHA-256: 5d4b03076d4e23a0bacdb637752a9f841e8d541b6338e8b2515f1def31b428b1
font_01_sfnt_off00008820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8820 19528 bytes
SHA-256: 94cf8dd36225bd5bd48651a49ba8be74926393b712f5d293241f136797247c85

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