Malicious PDF — malware analysis report

Static analysis result for SHA-256 deea0a950bcb4b64…

MALICIOUS

PDF

43.3 KB Created: 2021-06-03 06:31:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f87e1b60929b5d227974aafe7f6dd37a SHA-1: d509c5ad2ac2c56c145ad94926b68e91d6748bc4 SHA-256: deea0a950bcb4b646920c79b705234d2ceb7d9359663542ad1869764efcf90a8
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with the document. It also contains an embedded URI pointing to a suspicious URL, likely intended to download a second-stage payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/roblox-login-hack-game-hack
    • http://empresa-venta.hr/files/ultimate-free-spins-coin-master_GM406889139.pdf
    • http://empresa-venta.hr/files/free-2021-robux_GM431946152.pdf
    • http://empresa-venta.hr/files/roblox-rewards-robux_GM431946152.pdf
    • http://empresa-venta.hr/files/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://empresa-venta.hr/files/minecraft-free-education_GM479516143.pdf
    • http://empresa-venta.hr/files/free-roblox-toy-codes_GM431946152.pdf
    • http://empresa-venta.hr/files/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdf
    • http://empresa-venta.hr/files/coin-master-hack-spin-ios_GM406889139.pdf
    • http://empresa-venta.hr/files/how-to-hack-minecraft_GM479516143.pdf
    • http://empresa-venta.hr/files/static-moonactive-net-rewards-2021_GM406889139.pdf
    • http://empresa-venta.hr/files/hack-coin-master-site-rssingcom_GM406889139.pdf
    • http://empresa-venta.hr/files/how-to-get-free-tiktok-fans_GM835599320.pdf
    • http://empresa-venta.hr/files/is-minecraft-free-on-ps4_GM479516143.pdf
    • http://empresa-venta.hr/files/coin-master-twitter-free-spins_GM406889139.pdf
    • http://empresa-venta.hr/files/coin-master-haktuts_GM406889139.pdf
    • http://empresa-venta.hr/files/roblox-free-item-codes_GM431946152.pdf
    • http://empresa-venta.hr/files/google-moon-active_GM406889139.pdf
    • http://empresa-venta.hr/files/roblox-hack-download_GM431946152.pdf
    • http://empresa-venta.hr/files/free-rare-cards-for-coin-master-christmas_GM406889139.pdf
    • http://empresa-venta.hr/files/robux-hack-generator_GM431946152.pdf
    • https://www.communes.com
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004df2.bin
4fb051b83252e87b843cc1558f757ca1e066ec0496076bf5eefe14760b4fc925		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DF2 24272 bytes
font_01_sfnt_off00008555.bin
4594c9d52aa6913ba89b547defae6e50b5d648d55ef93ab0faf484389542556d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8555 18592 bytes

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