Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc8e8228b0979caa…

MALICIOUS

PDF

43.1 KB Created: 2021-05-16 19:40:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 53eb7e97c9dd776c063955c68e9268a5 SHA-1: 7efc93e57886e38cc79129f531ffe095680666c8 SHA-256: bc8e8228b0979caacfeb3cc52b63951a7e13f0b0adc2705bf3a06e709e600ae4
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to trick the user into clicking a link, which is a common social engineering tactic. The embedded URLs, such as 'https://netcdn.xyz/app/406889139/coin-master-hack-without-verification-or-downloading-apps-game-hack', likely lead to malicious content or phishing pages. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit user interaction for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-hack-without-verification-or-downloading-apps-game-hack
    • http://mycounty.com.ua/images/coin-master-hack-generator-tool_GM406889139.pdf
    • http://mycounty.com.ua/images/robux-generator-no-human-verification_GM431946152.pdf
    • http://mycounty.com.ua/images/robux-hack-2021_GM431946152.pdf
    • http://mycounty.com.ua/images/http-appsmob-info-coin-master-hack_GM406889139.pdf
    • http://mycounty.com.ua/images/what-are-points-for-in-roblox_GM431946152.pdf
    • http://mycounty.com.ua/images/robux-hack-tools_GM431946152.pdf
    • http://mycounty.com.ua/images/how-to-get-free-robux-without-email_GM431946152.pdf
    • http://mycounty.com.ua/images/free-spins-on-coin-master_GM406889139.pdf
    • http://mycounty.com.ua/images/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdf
    • http://mycounty.com.ua/images/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdf
    • http://mycounty.com.ua/images/free-roblox-clothes-codes_GM431946152.pdf
    • http://mycounty.com.ua/images/free-robux-reddit_GM431946152.pdf
    • http://mycounty.com.ua/images/free-coin-master-spins-2021_GM406889139.pdf
    • http://mycounty.com.ua/images/free-robux-site_GM431946152.pdf
    • http://mycounty.com.ua/images/games-like-coin-master_GM406889139.pdf
    • http://mycounty.com.ua/images/coin-master-free-cards-link-2021_GM406889139.pdf
    • http://mycounty.com.ua/images/how-to-get-free-robux-promo-codes_GM431946152.pdf
    • http://mycounty.com.ua/images/free-robux-no-download_GM431946152.pdf
    • http://mycounty.com.ua/images/coin-master-claim-spins_GM406889139.pdf
    • http://mycounty.com.ua/images/free-robux-gift-card_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004952.bin
b62ba43a80d5259754f989092579ec1a7611f49d3cec8f6293f0f060b64b100d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4952 24964 bytes
font_01_sfnt_off000082db.bin
7055c0b927c5b3f5d83892c818414459ed7060aca91a64b83b2bd90b5073d3c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82DB 19400 bytes

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