Malicious PDF — malware analysis report

Static analysis result for SHA-256 db53f201aec58ced…

MALICIOUS

PDF

44.3 KB Created: 2021-05-17 19:41:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: bffb82be0641eb167a20908cbdf07a11 SHA-1: 1009b7b1bdd67308652f09ad768b31f70e4781b8 SHA-256: db53f201aec58ced4d4885cd3195874fe3728ca8a68ec60e27d6dd9aebae7999
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document employs a fake CAPTCHA lure to deceive users into interacting with malicious content. It contains an external URI pointing to a suspicious URL, likely intended to deliver a secondary payload or redirect the user to a phishing site. The document's content and heuristics strongly suggest a social engineering attack aimed at tricking the user into downloading or executing further malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/479516143/minecraft-images-free-game-hack PDF link annotation
    • http://pietroubaldi.org.br/images/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://pietroubaldi.org.br/images/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://pietroubaldi.org.br/images/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://pietroubaldi.org.br/images/coin-master-free-spins-1701-20_GM406889139.pdfIn PDF document text
    • http://pietroubaldi.org.br/images/coin-master-today_GM406889139.pdfIn PDF document text
    • http://pietroubaldi.org.br/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://pietroubaldi.org.br/images/download-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://pietroubaldi.org.br/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://pietroubaldi.org.br/images/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
    • http://pietroubaldi.org.br/images/roblox-hack_GM431946152.pdfIn PDF document text
    • http://pietroubaldi.org.br/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://pietroubaldi.org.br/images/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://pietroubaldi.org.br/images/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://pietroubaldi.org.br/images/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pietroubaldi.org.br/images/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pietroubaldi.org.br/images/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://pietroubaldi.org.br/images/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • http://pietroubaldi.org.br/images/coin-master-free-in-app-purchases_GM406889139.pdfIn PDF document text
    • http://pietroubaldi.org.br/images/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
    • http://pietroubaldi.org.br/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48D1 24976 bytes
SHA-256: 0946ced42419b02731b1760d42765276796c438970021bb2af2405f131c5c1a3
font_01_sfnt_off0000814a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x814A 2856 bytes
SHA-256: 8c5d9bcb386d88c7f99323d8d482e46ea21dea038a5b842744dd5d39b26b2c44
font_02_sfnt_off00008b20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B20 18116 bytes
SHA-256: 76604dd5740139514d3fd46c2a9d9c838f52c59b348f00b4ee9f07d20b77a693

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