Malicious PDF — malware analysis report

Static analysis result for SHA-256 83b84860765b5a0b…

MALICIOUS

PDF

42.9 KB Created: 2021-05-16 07:30:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2d579922ed8703cd09101cc6e24e5051 SHA-1: 61bc18b05728d1a4818ad2a3c428ccdb384917fe SHA-256: 83b84860765b5a0b9811ea90898676498e9c2bc3a11df76fb0443fda0bbe36d4
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure to trick users into downloading a payload from the embedded URL. The document body and heuristics indicate a social engineering attempt to obtain in-game currency or cheats. The primary malicious URL identified is https://netcdn.xyz/app/431946152/instant-robux-game-hack.

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/431946152/instant-robux-game-hack
    • http://www.equistop.it/images/_GM479516143.pdf
    • http://www.equistop.it/images/coin-master-free-coins-and-spins-app_GM406889139.pdf
    • http://www.equistop.it/images/coin-master-free-spins-hacktman_GM406889139.pdf
    • http://www.equistop.it/images/coin-master-hack-tool-v1-9-apk_GM406889139.pdf
    • http://www.equistop.it/images/coin-master-mod-version-free-download-ios_GM406889139.pdf
    • http://www.equistop.it/images/free-robux-wheel_GM431946152.pdf
    • http://www.equistop.it/images/roblox-free-item-codes_GM431946152.pdf
    • http://www.equistop.it/images/blogger-coin-master-free-spins_GM406889139.pdf
    • http://www.equistop.it/images/free-robux-android_GM431946152.pdf
    • http://www.equistop.it/images/free-gifts-coin-master_GM406889139.pdf
    • http://www.equistop.it/images/how-to-get-free-chest-in-coin-master_GM406889139.pdf
    • http://www.equistop.it/images/coin-master-daily-free-spins-link-today-2021_GM406889139.pdf
    • http://www.equistop.it/images/roblox-heroes-online_GM431946152.pdf
    • http://www.equistop.it/images/coin-master-free-spins-2021-blogspot_GM406889139.pdf
    • http://www.equistop.it/images/coin-master-hacks_GM406889139.pdf
    • http://www.equistop.it/images/who-to-get-free-robux_GM431946152.pdf
    • http://www.equistop.it/images/coin-master-cards-for-free_GM406889139.pdf
    • http://www.equistop.it/images/how-to-get-free-robux-on-mobile_GM431946152.pdf
    • http://www.equistop.it/images/free-minecraft-printables-food-labels_GM479516143.pdf
    • http://www.equistop.it/images/robux-fun-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047fc.bin
9056dd5fff21c54b3066244b7343d780a460fdc3247112a2d1a3514e1c97ddb9		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47FC 27096 bytes
font_01_sfnt_off00008595.bin
234f9e95fa1241feb438ae0efba81c56d05ba2863eb0b0d090bdd6eb60e49a51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8595 18184 bytes

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