Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc386e16a4722c65…

MALICIOUS

PDF

41.5 KB Created: 2021-04-28 04:37:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a985461b2949f603a1670d733dbb31bd SHA-1: d7232619e3a9e0a43ab1a364f99daa70c8f50998 SHA-256: dc386e16a4722c658680cfee03e8f5d3bab869ee9dfd8b16e4a2d9c9dd57f8bd
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links, with one specifically identified as a CAPTCHA lure. The document body and extracted URLs suggest a scam related to obtaining free items or currency for the game Roblox. The presence of these links indicates an attempt to redirect the user to potentially malicious websites, likely as part of a phishing or scam operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 5

  • Invisible PDF links to CAPTCHA-themed web lure high PDF_CAPTCHA_LINK_LURE
    PDF contains invisible clickable link annotations that point to a CAPTCHA/capcha-themed web path. This is a common phishing and ClickFix-style routing pattern: the PDF itself is inert, while the linked page performs the credential prompt or fake verification.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/431946152/how-to-get-ninja-animation-for-free-roblox-game-hack PDF link annotation
    • http://www.saburai.ac.id/elibrary//repository/free-face-roblox-makeup.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-roblox-accounts-with-bubble-gum-sim-pets.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-that-you-can-play-for-free.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/uirbx-club-roblox-robux-hack-generator.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-email-reset-hack.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/izuku-midoriya-roblox-free-schop.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-dungeon-quest-hack-download.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-boy-shirts-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-robux-generator-recaptcha.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/instantrobux-com-free-robux.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_off0000438d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x438D 26348 bytes
SHA-256: b4a3a1ef53a77b802a9b7ead0ec03e04b92002b5c1aaf54f0564be14d5181f7d
font_01_sfnt_off00007e52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E52 19012 bytes
SHA-256: 9033fab00297aedf9402be874f8e4990e05f47e4aa951fdbdeb61a8c13536ae7

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