Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7651d0d1ced7de3…

MALICIOUS

PDF

36.6 KB Created: 2021-05-24 23:02:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f5fc810e7a66410de6c5b5117b2ee48d SHA-1: e327b6dc0bc919ee521cb2cc9bd39d68ee10c289 SHA-256: b7651d0d1ced7de351548ab2e208a1f6769afd39a884b0888035fa6d77a7ea0e
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, aiming to trick users into clicking a malicious link. The document body explicitly mentions 'Free Robux No Offers' and provides a URL that likely leads to a malicious download or exploit. Several other suspicious URLs related to game hacks and cheats were also extracted.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/431946152/free-robux-no-offers-game-hack
    • http://inextpresident.com/images/impact-minecraft-hack_GM479516143.pdf
    • http://inextpresident.com/images/minecraft-apk-download-v1-144-2-free_GM479516143.pdf
    • http://inextpresident.com/images/my-roblox-account-was-hacked_GM431946152.pdf
    • http://inextpresident.com/images/how-to-get-free-spins-grom-coin-master_GM406889139.pdf
    • http://inextpresident.com/images/coin-master-mod-apk-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003212.bin
7b776dea383e0014398b25180194dab4ff9d97b951424587d857b75c4b4d21e7		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3212 26452 bytes
font_01_sfnt_off00006eac.bin
db6be32425767485114cb9000642ed63280f0807e0fe45793765b8e181fce2c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAC 18012 bytes

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