Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4218f571bfa5a91…

MALICIOUS

PDF

35.1 KB Created: 2021-06-27 05:05:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: cb4597e8558bfb0c3a32243b257fcd04 SHA-1: d8fba86301c20799ae058ee0528c1b12a7da85ce SHA-256: c4218f571bfa5a914b1b732501fcf63fc57b83509a5ac23291e66ff95703557a
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on `lib.fisipumt.ac.id` and appear to be part of a link farm designed to attract users searching for game cheats and hacks. The primary URL `http://netcdn.co/app/431946152/turtle-roblox-hack-game-hack` suggests a direct download or exploit attempt. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is intended to deliver a malicious payload or lead users to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/turtle-roblox-hack-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/2021-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-skin-roblox-wiki_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-add-mods-to-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/can-you-get-roblox-on-switch-for-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/real-free-robux-hack-to-buy-anything-kindle_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/grow-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-catalog-items-roblox-2021-december_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-money-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/earn-robux-sites_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-it_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/como-ser-um-hacker-de-roblox-iniciante-no-pc_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-on-apocalypse-rising-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.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_off00003163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3163 22920 bytes
SHA-256: 80a95b54275cac9322d9624437b79ae8f8de9c17572074e090b3a9e94f410cc0
font_01_sfnt_off000064a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A2 18900 bytes
SHA-256: 041d85909de9a3cd7532dfa8ad4c81acecdbf47ac37714967b801086b269fc7d

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