Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd920e8bfd140303…

MALICIOUS

PDF

35.1 KB Created: 2021-06-27 16:26:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e72c29ed11901a1b6f057e7f326bc7fd SHA-1: 151a9862932e438b73f27a28ce3085642c609f89 SHA-256: bd920e8bfd14030380256052ab21553e72bfefec97ead30d0a8d7eed719ffeaa
102 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are SEO-optimized pages advertising game hacks and cheats. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to drive traffic to potentially harmful content. The ML classifier also strongly flagged this PDF as malicious. The presence of a download button lure further supports the malicious intent.

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/roblox-hack-ninja-simulator-hacked-game-hack PDF link annotation
    • https://fib.ub.ac.id/sac/repository/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/100-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-rewards-link_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-robux-no-hack-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-no-waiting-pastebin_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-robux-hack-generator-no-survey-tool_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-fire-vs-pubg-tik-tok_GM835599320.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/easy-robux-generator_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-website_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/robux-codes-free-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-generator_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-robux-for-free-hacking_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-get-free-robux-generator_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_off00003130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3130 22172 bytes
SHA-256: 933b1433bb9eebe4667d425fcfc88387cdafb02189127b9702de20339dd1b5f9
font_01_sfnt_off0000623a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623A 19644 bytes
SHA-256: d2228e800c3a4a53d56cf77fe0d1105383b50df96aa8bd1e936ff902b5530249

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