Malicious PDF — malware analysis report

Static analysis result for SHA-256 11e104f20487a2bf…

MALICIOUS

PDF

44.5 KB Created: 2021-06-13 20:53:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 927a3dc0e59a4c79c92ae353fb54be65 SHA-1: e14a818f1ec07f8633e5ceab3deda71069bbab37 SHA-256: 11e104f20487a2bfbe2ca80c19ef43cb1b5f755d9eaaef55066d3c25058d57e7
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to trick users into interacting with malicious links. The embedded URLs, such as http://netcdn.co/app/431946152/how-to-get-free-money-roblox-vehicle-simulator-game-hack, likely lead to the download of a second-stage payload. The document's content and heuristics strongly suggest a phishing or social engineering attack aimed at users interested in online games.

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/how-to-get-free-money-roblox-vehicle-simulator-game-hack PDF link annotation
    • https://kierowcyhgv.uk/images/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/gaming-dunia-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://kierowcyhgv.uk/images/how-to-get-free-accessories-on-roblox_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-coin-master-game_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/how-to-change-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://kierowcyhgv.uk/images/how-to-get-any-hat-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/coin-master-gifts_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/coin-master-daily-free-spins-link-today-2021-free_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/2021-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-spins-and-coins-from-coin-master-game_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
stream_003_off00004b64.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B64 26612 bytes
SHA-256: 1d8dc37e09710d77a263ab04db60507de4bd62f5c954e56bfee742ea318219bd
font_01_sfnt_off000087b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87B5 19640 bytes
SHA-256: 66ba8be28e21e1f6892bf6d625a2dedbf715413b1df908ec5ab8f1ad8347ad50

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