Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0ebd82fcff7ef44…

MALICIOUS

PDF

36.4 KB Created: 2021-06-26 17:54:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 64e30a05c2fc1f3daa917f196ff6e869 SHA-1: 668f6c71eda38451e203bdb2e4bf2e493ca98c61 SHA-256: d0ebd82fcff7ef44f34e4512ca9d4bb4bf1f8a5a46f053fdf5de2b94a0d7d34a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents a fake CAPTCHA lure, aiming to trick the user into downloading a payload from the external URL http://netcdn.co/app/431946152/infinite-jump-roblox-download-free-game-hack. The presence of multiple embedded URLs and the ML classifier's high confidence score indicate a malicious intent to deliver further stages of an attack. No scripts were extracted, but the document structure and heuristics strongly suggest a downloader or exploit delivery mechanism.

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/infinite-jump-roblox-download-free-game-hack PDF link annotation
    • http://www.sanjosedeminas.gob.ec/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.sanjosedeminas.gob.ec/images/robux-hack-generator-no-veriy_GM431946152.pdfIn PDF document text
    • http://www.sanjosedeminas.gob.ec/images/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sanjosedeminas.gob.ec/images/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • http://www.sanjosedeminas.gob.ec/images/pagina-de-hack-de-roblox_GM431946152.pdfIn PDF document text
    • http://www.sanjosedeminas.gob.ec/images/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.sanjosedeminas.gob.ec/images/facebook-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.sanjosedeminas.gob.ec/images/roblox-admin-hack-tool_GM431946152.pdfIn PDF document text
    • http://www.sanjosedeminas.gob.ec/images/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://www.sanjosedeminas.gob.ec/images/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.sanjosedeminas.gob.ec/images/girl-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://www.sanjosedeminas.gob.ec/images/how-to-hack-on-tower-of-hell-roblox_GM431946152.pdfIn PDF document text
    • http://www.sanjosedeminas.gob.ec/images/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.sanjosedeminas.gob.ec/images/coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://www.sanjosedeminas.gob.ec/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.sanjosedeminas.gob.ec/images/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://www.sanjosedeminas.gob.ec/images/hack-roblox-with-chrome_GM431946152.pdfIn PDF document text
    • http://www.sanjosedeminas.gob.ec/images/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • http://www.sanjosedeminas.gob.ec/images/free-robux-claim-gg_GM431946152.pdfIn PDF document text
    • http://www.sanjosedeminas.gob.ec/images/roblox-hack-site_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
font_00_sfnt_off000032e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32E7 22892 bytes
SHA-256: f92faf863fdb649f72b283c55bd860e440d436a18e8e22217117576d04b07ac0
font_01_sfnt_off0000662b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x662B 20120 bytes
SHA-256: 1efe9fad073b2d0d6cb504c6168810f054ab33f4932377e73a58ee3de77407d5

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