Malicious PDF — malware analysis report

Static analysis result for SHA-256 afb644b269c038b1…

MALICIOUS

PDF

45.6 KB Created: 2021-06-04 01:24:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: cb4f47c237ef9aa5e4faf143e4ee3a4a SHA-1: 1593743cf487bbbceee43dd2856d619fea8d6521 SHA-256: afb644b269c038b14db796dd8cf2ea62f1e9b6dd32ed5a656ce34f2db56ef820
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous SEO-optimized links pointing to external resources, likely designed to lure users into downloading malware or visiting phishing sites. The presence of a direct download URL and a large number of related links suggests a campaign focused on distributing unwanted or malicious software, potentially related to games like Minecraft or Coin Master. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.online/app/479516143/free-minecraft-java-server-game-hack PDF link annotation
    • http://lib-smansumsel.sch.id/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/new-free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/tiktok-free-play_GM835599320.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-online_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-downgrade-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/google-coin-master-free-spins_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_off00005373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5373 28280 bytes
SHA-256: abc31614a0791b1884391344d1a3ac055d30ec9dec6c6a5bf51079004fc64499
font_01_sfnt_off00009138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9138 17848 bytes
SHA-256: c817850addb7f4586eab0926175a8ce7be5c169962767968ade405e83d703cb9

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