Malicious PDF — malware analysis report

Static analysis result for SHA-256 bccb384e30fd2673…

MALICIOUS

PDF

45.7 KB Created: 2021-06-09 12:42:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 07add0bd540fd8232b145744116f2791 SHA-1: 104c61517762667960e6f7e8e8c63504d3dcac63 SHA-256: bccb384e30fd2673436ecfd2d4f9aa425855139fcfad6b8a86e399c9b6905166
82 Risk Score

Malware Insights

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

The document contains a fake CAPTCHA lure, a common social engineering tactic to trick users into interacting with malicious content. It also embeds an external URI pointing to a URL that likely hosts a payload. The presence of numerous related URLs suggests a campaign focused on distributing potentially unwanted or malicious applications, possibly related to gaming or in-game currency.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9813

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.tw/app/431946152/equillex-free-robux-game-hack PDF link annotation
    • https://www.audipec.com.br/images/minecraft-free-app_GM479516143.pdfIn PDF document text
    • https://www.audipec.com.br/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://www.audipec.com.br/images/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • https://www.audipec.com.br/images/whats-robux_GM431946152.pdfIn PDF document text
    • https://www.audipec.com.br/images/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • https://www.audipec.com.br/images/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.audipec.com.br/images/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • https://www.audipec.com.br/images/roblox-free-robox-dite_GM431946152.pdfIn PDF document text
    • https://www.audipec.com.br/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://www.audipec.com.br/images/coin-master-mod-version-free-download-2021_GM406889139.pdfIn PDF document text
    • https://www.audipec.com.br/images/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.audipec.com.br/images/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • https://www.audipec.com.br/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://www.audipec.com.br/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://www.audipec.com.br/images/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://www.audipec.com.br/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://www.audipec.com.br/images/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • https://www.audipec.com.br/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.audipec.com.br/images/best-tricks-co-robux_GM431946152.pdfIn PDF document text
    • https://www.audipec.com.br/images/real-robux_GM431946152.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_004_off000052a6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52A6 25396 bytes
SHA-256: da6977a6efd74070f9df79ee80a5474a1c4ca7f0a91cf046729d722a12108b33
font_01_sfnt_off00008d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D5C 19168 bytes
SHA-256: cdbfc69e4ce0ccbc936fbb2eaf424136e72c9b026ba0b0036bb0dab52022be6b

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