Malicious PDF — malware analysis report

Static analysis result for SHA-256 24266387408c8041…

MALICIOUS

PDF

42.3 KB Created: 2021-05-16 02:01:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 66e40d6a8a0e4de24907bc6852c1d8cb SHA-1: 8d0938fd4ecf05cfbdbb6d2d15a34c25e9305803 SHA-256: 24266387408c804103407675528892d3e977acce33ba1a370b33d84b8d652f5a
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA lure to trick users into interacting with malicious links. The embedded URI points to a site offering 'Coin Master Free 2021 Spin Link', suggesting a scam or phishing attempt. While no scripts were directly extracted, the PDF structure and heuristics indicate it's designed to exploit user interaction for malicious purposes, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-free-2021-spin-link-game-hack
    • http://sistem.amikomsolo.ac.id/perpus/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/www-roblox-com-free-robux_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/roblox-mobile-hack_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/coin-master-online-hack_GM406889139.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/apps-that-give-you-free-robux_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/free-spins-link-in-coin-master-2021_GM406889139.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/coin-master-hack-no-human-verification_GM406889139.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/coin-master-free-spins-2-5-2021_GM406889139.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/android-coin-master-3433-apk-hack_GM406889139.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/open-coin-master_GM406889139.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/free-spin-coin-master-2021_GM406889139.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/robux-com-roblox_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/robux-free-2021_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/minecraft-hack-app_GM479516143.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/how-to-get-free-robux-no-human-verification_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/roblox-login-hack_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/free-robux-reddit_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/mcpe-free-download_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049e2.bin
a6c33df3126375bd2e9424999cfc75edc90b579bb611f653b3647a46a253633c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49E2 24548 bytes
font_01_sfnt_off00008266.bin
b7ae3d16bb028351929840db057611194e7c02105e6dbd3e36d0326cc4cd0414		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8266 18456 bytes

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