Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fbf7bf0c3ce061f…

MALICIOUS

PDF

35.1 KB Created: 2021-06-23 02:38:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 543e7aee86e28a6f89f1127cbd4d1b89 SHA-1: 11f2192f11d91e1bd8fe87c7fa323726abb4d931 SHA-256: 8fbf7bf0c3ce061f2dcf747d17948836fd73d767d0ce19387eab5178ce2dd38d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document presents itself as a lure for game-related cheats or currency, employing a fake CAPTCHA to trick the user into interacting with embedded links. The primary malicious URL identified is http://netcdn.co/app/431946152/hacks-para-infinity-anime-roblox-game-hack, which likely serves as a distribution point for a second-stage payload. The presence of a fake CAPTCHA heuristic strongly suggests a social engineering tactic to bypass user caution and initiate a download or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/hacks-para-infinity-anime-roblox-game-hack PDF link annotation
    • https://gastronomytours.gr/ckfinder/userfiles/files/free-robux-mod_GM431946152.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/roblox-survey-for-robux_GM431946152.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/mcpe-master-unlimited-coins-free-download_GM406889139.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/robuxfree-con_GM431946152.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/free-robux-no-human-verification-required_GM431946152.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/how-to-get-free-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/youtube-how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/robux-survey_GM431946152.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/how-to-make-your-own-dominus-in-roblox-free_GM431946152.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/roblox-source_GM431946152.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/how-to-get-the-snowman-package-free-in-roblox_GM431946152.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/free-coins_GM406889139.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C1 22268 bytes
SHA-256: fd0050993630b8babe5147eb487a7e6f32e779e24999aacbe9c6ad875c41b652
font_01_sfnt_off000062c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C7 19472 bytes
SHA-256: 41bbc0292e8837a7dcc903584919621a6c7fc96bdd4fd0ac0c4a5d0ed85f8646

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