Malicious PDF — malware analysis report

Static analysis result for SHA-256 38ed256852a5f7eb…

MALICIOUS

PDF

48.0 KB Created: 2021-05-16 17:10:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7e4d5bf1944f1ac8b7d8cde7e7c3d5a7 SHA-1: 19d4ba5c9ab8246e7659246df323fd9290a450cb SHA-256: 38ed256852a5f7ebbe3b0155e407ef2525e9ba14f114a9626dbf398907862a38
82 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a malicious lure, specifically employing a fake CAPTCHA and a download button to trick users into downloading potentially harmful software. The embedded URL points to a suspicious domain hosting what appears to be a game-related download, likely a malicious application. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to exploit user interaction for initial execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/479516143/minecraft-apk-download-free-1.1-0.55-game-hack PDF link annotation
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/roblox-generator-com_GM431946152.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/hack-coin-master-link_GM406889139.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/coin-master-free-pet-food_GM406889139.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/get-free-robux_GM431946152.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/free-100-robux_GM431946152.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/free-attacks-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004f13.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F13 27516 bytes
SHA-256: 604cba82540da44440d7bf57d6a3752b072e4be401bec11fc5262bef76512770
font_01_sfnt_off00008c8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8C 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off0000969b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x969B 19116 bytes
SHA-256: a6c96b4407ebb47f2cfd29e129a6a077725395da0bf0a570e52244455dfee05f

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