Malicious PDF — malware analysis report

Static analysis result for SHA-256 333b4aa62ef865d5…

MALICIOUS

PDF

38.6 KB Created: 2021-05-25 06:41:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f9d63efe0ce01f5103202a4466afae0c SHA-1: ae067082cbb16e0451998fb4a83e3844a762cfb2 SHA-256: 333b4aa62ef865d5bfc57d8fdfbbaf078f5f1a6cd8b314fb94d247961662545f
82 Risk Score

Malware Insights

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

The PDF document displays a fake CAPTCHA and a download button lure, aiming to trick the user into clicking a link. The primary malicious URL identified is https://netcdn.xyz/app/406889139/free-coins-and-spins-for-coin-master-game-hack, which is likely used to deliver a secondary payload or conduct phishing. Several other related URLs were also extracted from the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/free-coins-and-spins-for-coin-master-game-hack
    • http://modlingua.com/images/coin-master-free-spins-2021_GM406889139.pdf
    • http://modlingua.com/images/minecraft-svg-images-free_GM479516143.pdf
    • http://modlingua.com/images/get-free-coin-master_GM406889139.pdf
    • http://modlingua.com/images/coin-master-hacks-for-iphone_GM406889139.pdf
    • http://modlingua.com/images/minecraft-free-apk_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000032f2.bin
45b2c7e5b2684c604b5bfa9d572ffbb6cbb539861d89ae528c26b5ce733b1e63		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32F2 25020 bytes
font_01_sfnt_off00006c27.bin
c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C27 2896 bytes
font_02_sfnt_off0000760c.bin
f1068137021f01f6b5cc3550273fdf5362b49e27ffe305b66dd7920a08d48120		 pdf-font-stream PDF embedded font (sfnt) at offset 0x760C 18060 bytes

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