Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d166441bcc93401…

MALICIOUS

PDF

43.2 KB Created: 2021-05-16 17:30:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 48f307a0519590e21da8daad518b14cb SHA-1: cb23c80ccdd2c01c19ffa97648bd623ff5487e2f SHA-256: 1d166441bcc934013ef1fc361739614f12eb0d8066a21175abd591abd250b8d3
182 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA and browser extension installation lure, aiming to trick users into downloading malicious content. It also features a link farm with numerous URLs pointing to game-related cheats and free Robux, suggesting a social engineering campaign to distribute malware or lead users to phishing sites. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/bloxland-earn-free-robux-game-hack
    • http://yogaschooldecypres.be/images/how-to-get-free-robux-no-human-verification_GM431946152.pdf
    • http://yogaschooldecypres.be/images/free-spin-coin-master-2021_GM406889139.pdf
    • http://yogaschooldecypres.be/images/coin-master-hack-no-verify_GM406889139.pdf
    • http://yogaschooldecypres.be/images/free-roblox-girl-hair-not-a-model_GM431946152.pdf
    • http://yogaschooldecypres.be/images/coin-master-free-spin-link-app_GM406889139.pdf
    • http://yogaschooldecypres.be/images/coin-master-free-spins-link-app-download_GM406889139.pdf
    • http://yogaschooldecypres.be/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://yogaschooldecypres.be/images/noob-vs-pro-vs-hacker-vs-god-minecraft_GM479516143.pdf
    • http://yogaschooldecypres.be/images/coin-master-free-spins-and-coins-blogspot_GM406889139.pdf
    • http://yogaschooldecypres.be/images/how-to-host-a-minecraft-server-for-free_GM479516143.pdf
    • http://yogaschooldecypres.be/images/60-free-spins-on-coin-master_GM406889139.pdf
    • http://yogaschooldecypres.be/images/free-robux-gift-card_GM431946152.pdf
    • http://yogaschooldecypres.be/images/how-to-get-robux-for-free-2021_GM431946152.pdf
    • http://yogaschooldecypres.be/images/free-robux-codes_GM431946152.pdf
    • http://yogaschooldecypres.be/images/roblox-ftw_GM431946152.pdf
    • http://yogaschooldecypres.be/images/robux-hack-2021_GM431946152.pdf
    • http://yogaschooldecypres.be/images/roblox-robux_GM431946152.pdf
    • http://yogaschooldecypres.be/images/bloxawards-com-earn-free-robux_GM431946152.pdf
    • http://yogaschooldecypres.be/images/game-give-free-robux_GM431946152.pdf
    • http://yogaschooldecypres.be/images/coin-master-game-hacking-tricks_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049db.bin
100bf70accb76d6d594cf49e6d8788c73d1bf10c2577fa4123b81ebdd69a9e0a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49DB 25700 bytes
font_01_sfnt_off000085c0.bin
fc87a0e838629003b9f405fc2c8429e0a8062f092f4b8629944097aaaaee9c58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85C0 18492 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.