Malicious PDF — malware analysis report

Static analysis result for SHA-256 def703e150352d54…

MALICIOUS

PDF

35.0 KB Created: 2021-07-01 23:27:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 1f39200dd0c3b5f9e4b33b27d73cb28f SHA-1: c899753f86a44a9185dd7f0305582641e250cb31 SHA-256: def703e150352d54d831ad411182f5dbb288beabdf6289cedd841d876f2f2fa8
102 Risk Score

Malware Insights

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

This PDF document employs a link farm strategy, embedding numerous SEO-optimized links that masquerade as guides for game hacks and free items. The primary URL, http://netcdn.co/app/431946152/roblox-is-using-cheat-engine-hacking-game-hack, and the extensive list of related links on e-pustaka.stkipadzkia.ac.id suggest a coordinated effort to direct users to potentially malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a 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-is-using-cheat-engine-hacking-game-hack PDF link annotation
    • http://e-pustaka.stkipadzkia.ac.id/repository/dragon-ball-final-stand-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/hacks-for-saob-roblox_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/how-to-hack-admin-on-roblox-without-cheat-engine_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/how-to-get-free-robux-using-javascript_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/how-to-get-builders-club-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/games-cheat-engine-works-roblox_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/how-to-get-free-gamepasses-on-roblox_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/how-to-add-free-robux-to-your-account_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/roblox-virtual-cheat_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/robux-robux_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-robux-cheats-without-human-verification_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/roblox-tycoon-games-for-free_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-free-spins-link-facebook-page_GM406889139.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/all-roblox-2021-free-tails_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-official-website_GM406889139.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-roblox-accounts-with-obc-2021-bugmenot_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_off000032b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32B3 22192 bytes
SHA-256: 2b1eb5be9a003614b2f2a923a9423077e157db1bee417190bbe92ce13d95639d
font_01_sfnt_off000063e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E8 19044 bytes
SHA-256: 71b1627ee948340f76dcdd043384723a02fb6d482e3690c736b7dafda7b1662a

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