Malicious PDF — malware analysis report

Static analysis result for SHA-256 755cb23022289656…

MALICIOUS

PDF

46.1 KB Created: 2021-06-04 02:24:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 26af2b860c83bc00dfebbb51c95b33c3 SHA-1: eac9cf878b9e9742c4b24230fc6cc88038e1a2e8 SHA-256: 755cb230222896565dca9e89f21d99e2309b717c78e8ebd759096f1335cc58af
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document that displays a fake CAPTCHA or human verification prompt, a common lure to trick users into clicking malicious links. The document body contains a URL pointing to a resource that likely hosts a payload or further malicious content. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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.online/app/406889139/free-spins-coin-master-links-game-hack
    • http://library.fisip.upnvj.ac.id/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdf
    • http://library.fisip.upnvj.ac.id/repository/is-roblox-free-on-ps4_GM431946152.pdf
    • http://library.fisip.upnvj.ac.id/repository/coin-master-game-hack-online_GM406889139.pdf
    • http://library.fisip.upnvj.ac.id/repository/free-rare-cards-for-coin-master-christmas_GM406889139.pdf
    • http://library.fisip.upnvj.ac.id/repository/free-daily-spins-coin-master_GM406889139.pdf
    • http://library.fisip.upnvj.ac.id/repository/free-spin-coin-master-hack-2021_GM406889139.pdf
    • http://library.fisip.upnvj.ac.id/repository/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdf
    • http://library.fisip.upnvj.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdf
    • http://library.fisip.upnvj.ac.id/repository/free-robux-exe_GM431946152.pdf
    • http://library.fisip.upnvj.ac.id/repository/mcpe-download_GM479516143.pdf
    • http://library.fisip.upnvj.ac.id/repository/robuxfree-con_GM431946152.pdf
    • http://library.fisip.upnvj.ac.id/repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdf
    • http://library.fisip.upnvj.ac.id/repository/robux-cheat_GM431946152.pdf
    • http://library.fisip.upnvj.ac.id/repository/can-i-play-roblox-for-free_GM431946152.pdf
    • http://library.fisip.upnvj.ac.id/repository/free-robux-apk_GM431946152.pdf
    • http://library.fisip.upnvj.ac.id/repository/how-can-u-get-free-robux_GM431946152.pdf
    • http://library.fisip.upnvj.ac.id/repository/coin-master-link-for-spins_GM406889139.pdf
    • http://library.fisip.upnvj.ac.id/repository/roblox-hack-generator_GM431946152.pdf
    • http://library.fisip.upnvj.ac.id/repository/coin-master-online-hack-generator_GM406889139.pdf
    • http://library.fisip.upnvj.ac.id/repository/free-spins-and-coins-on-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f69.bin
3769a51d2606c6db3c24bfda700084f62c3479b0947c28d5227f86b03a824318		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F69 24632 bytes
font_01_sfnt_off00008842.bin
30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8842 2840 bytes
font_02_sfnt_off000091f5.bin
07f1a9832fff0ce02b8ea8bcbd6448fb7022c7ac6c85a00fb5b887865844234a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91F5 18056 bytes

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