Malicious PDF — malware analysis report

Static analysis result for SHA-256 45576ce24993e18d…

MALICIOUS

PDF

44.4 KB Created: 2021-06-02 19:56:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c20cf1116d3ea5720ad8d907149f3cf6 SHA-1: 2cfbfa1432ecc1f4e6e4f509b7e9efaca17ae481 SHA-256: 45576ce24993e18dbdfd53ca5a2fd7149d9924cbf8c08b1279254d3fda4944fd
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 users into downloading a malicious file, likely related to game hacks or cheats. The embedded URL points to a resource that likely serves as a download or further redirection. While no scripts were directly extracted, the PDF structure and heuristics suggest an attempt to exploit user interaction for malicious purposes.

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.xyz/app/431946152/how-to-get-builders-club-on-roblox-for-free-2021-game-hack
    • http://medinup.pt/images/coin-master-hack-game-download-mod-apk_GM406889139.pdf
    • http://medinup.pt/images/is-minecraft-free_GM479516143.pdf
    • http://medinup.pt/images/how-to-hack-into-someones-roblox-account_GM431946152.pdf
    • http://medinup.pt/images/hack-version-of-coin-master_GM406889139.pdf
    • http://medinup.pt/images/free-minecraft-server-hosting-24-7_GM479516143.pdf
    • http://medinup.pt/images/tiktok-free-view-iphone-5c_GM835599320.pdf
    • http://medinup.pt/images/roblox-robux-hack_GM431946152.pdf
    • http://medinup.pt/images/114-hacks_GM479516143.pdf
    • http://medinup.pt/images/free-tiktok-fans-no-human-verification-ios_GM835599320.pdf
    • http://medinup.pt/images/100-hack-coin-master_GM406889139.pdf
    • http://medinup.pt/images/free-tiktok-accounts-with-followers_GM835599320.pdf
    • http://medinup.pt/images/free-multiplayer-minecraft-server_GM479516143.pdf
    • http://medinup.pt/images/free-robux-app_GM431946152.pdf
    • http://medinup.pt/images/free-minecraft-java-server_GM479516143.pdf
    • http://medinup.pt/images/how-to-earn-free-robux_GM431946152.pdf
    • http://medinup.pt/images/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdf
    • http://medinup.pt/images/free-minecraft-skins-pe_GM479516143.pdf
    • http://medinup.pt/images/how-to-get-java-minecraft-for-free_GM479516143.pdf
    • http://medinup.pt/images/minecraft-free-download-unblocked_GM479516143.pdf
    • http://medinup.pt/images/rbxfree-com-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005099.bin
44ce3fe5a65c8689a7c1f40de868ed1493682598f4b11ecd0cdf0588cd86a325		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5099 24316 bytes
font_01_sfnt_off0000887a.bin
7e37acaf818549e3f9fb7a68added7557e6262f79a1d7491cfb1a50091d22a2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x887A 19052 bytes

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