Malicious PDF — malware analysis report

Static analysis result for SHA-256 524ee30cfeeb258a…

MALICIOUS

PDF

45.8 KB Created: 2021-05-12 17:36:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: fd37aba8021a75ad0468cccf4c2e05e4 SHA-1: 25fcf31deaebb1c074305779b1c2851fe28e4a8c SHA-256: 524ee30cfeeb258a75e7b20f75096854bd3f38f39b9f50d9dad02354ee7e87c0
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links to external websites, many of which are structured as SEO-optimized links for game cheats and free in-game currency. The presence of a "download button" heuristic and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. The document's primary function appears to be a link farm designed to attract users searching for game exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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.xyz/app/431946152/how-to-cheat-in-roblox-game-hack PDF link annotation
    • http://perpus.stikesphi.ac.id/repository/coin-master-free-spins-link-download-for-iphone_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/minecraft-cheats-switch_GM479516143.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/robux-gratis_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-free-spin-app-reviews_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-hack-tool-no-survey_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-free-daily-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-get-more-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/daily-coin-master-free-spin-link-facebook_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A8D 25060 bytes
SHA-256: d86dc72a19c5914dc4baa91eca104f36a63574d289dbb82e48688883711509fb
font_01_sfnt_off00008449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8449 3500 bytes
SHA-256: e49a868379cd3c37e631c5a53c010e21f38d803532a2b8417aee82315d4e8634
font_02_sfnt_off00008feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FEB 18448 bytes
SHA-256: 65eb2ce946b42b9693923625c6007c764d2c4894e4322c6b46746fa0e9d37ece

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