Malicious PDF — malware analysis report

Static analysis result for SHA-256 92b7ac015587702f…

MALICIOUS

PDF

35.8 KB Created: 2021-05-21 14:01:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b2992c2f66cdda85d134aaecbbf8522e SHA-1: e99e33a76d4b5cf715ee20abd84c2184bb1ddfb9 SHA-256: 92b7ac015587702f25203d81de7a14e2e8b89afe4c7feef49c93fabce96c022f
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA lure related to 'Coin Master Free Spins Daily' and contains multiple embedded URLs, one of which points to a suspicious domain. The ML classifier also flagged this PDF as malicious. The presence of a fake CAPTCHA suggests an attempt to trick the user into executing a malicious action, likely by clicking a link to download or access further content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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-daily-game-hack
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/free-coin-master-spin-generator_GM406889139.pdf
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/coin-master-free-spin-daily-bonus_GM406889139.pdf
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdf
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/roblox-com-free-play_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000032e9.bin
44d88b834707ab6c09f9f163b0959534ce8d06056e76856801605d2f58da5e99		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32E9 24252 bytes
font_01_sfnt_off00006aad.bin
220bb6194b1ab8a2bb399ca4a862914ac8d15b354bb0df2c737bc67699221dc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAD 18308 bytes

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