Malicious PDF — malware analysis report

Static analysis result for SHA-256 939bdf0eec87cd54…

MALICIOUS

PDF

42.7 KB Created: 2021-05-14 07:42:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6ab130c8d42b2f62522784439236918c SHA-1: c7d063dd3d525dfe3c7d6f8eee1487c2ff8449d2 SHA-256: 939bdf0eec87cd54470e33025ecd3355cc381bc25eac645cc67ae1264cff19cb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The document employs a fake CAPTCHA lure to deceive users into clicking a link, likely for a game hack or cheat. The embedded URL and numerous similar URLs found in the document body suggest a phishing or scam campaign aimed at driving traffic to potentially malicious sites. The ML classifier also flagged this PDF as malicious.

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-spins-generator-game-hack
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/free-robux-co_GM431946152.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/coin-master-apk-free-download_GM406889139.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/minecraft-mobile-free_GM479516143.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/moonactive-free-spins-2021_GM406889139.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/coin-master--hack_GM406889139.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/coin-master-free-spins-no-generator_GM406889139.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/is-minecraft-dungeons-free_GM479516143.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/free-robux-codes-generator_GM431946152.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/coin-master-free-spin-no-offers_GM406889139.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/easy-points-gg_GM431946152.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/roblox-free-robux-com_GM431946152.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/easy-robux-today-com_GM431946152.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/www-roblox-com-robux-free_GM431946152.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/roblox40com-robux_GM431946152.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox_GM431946152.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/coin-master-fan_GM406889139.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/bux-life-free-robux_GM431946152.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/coin-master-free-gold-cards-link-2021_GM406889139.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/free-robux-codes-no-verification_GM431946152.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/coin-master-hack-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b98.bin
7aba3347844d0eefb901829cfdc3cef691fdab2368104b4dea9fe2e556efa345		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B98 25324 bytes
font_01_sfnt_off000085f4.bin
61e0f30a550a552155c2db6a7959ee396d6a34ca680bb4676c065f633eb1cbfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85F4 17884 bytes

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