Malicious PDF — malware analysis report

Static analysis result for SHA-256 467dc8440f13f67c…

MALICIOUS

PDF

41.9 KB Created: 2021-05-15 14:11:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 33a8b0bfa55fbe8ecd0a8c2e29c18bad SHA-1: ecf6fa77f20bc520cdee93f5e1cadc76bd87fa2a SHA-256: 467dc8440f13f67c83f88bd42c2297585a19dccbd62a38a34419b8081607832e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links and a document body that promotes free in-game currency and items, strongly suggesting a phishing or scam lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, likely to further the scam. While no scripts were explicitly extracted, the presence of embedded URIs and the ML classification point to malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/free-coins-app-for-coin-master-game-hack
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/how-to-earn-free-robux_GM431946152.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/coin-master-free-spin-game_GM406889139.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/how-to-get-a-free-dominus-in-roblox_GM431946152.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/free-robux-without-downloading-apps_GM431946152.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/robux-claimer_GM431946152.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/how-to-get-robux-on-phone_GM431946152.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/roblox-got-talent-piano-hack_GM431946152.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/roblox-hack-tool_GM431946152.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/roblox-games-with-free-boombox_GM431946152.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-ios_GM406889139.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/free-coin-master-cards-link_GM406889139.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-free-coins_GM406889139.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/coin-master-free-spin-today_GM406889139.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/roblox-hack-codes_GM431946152.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/como-hackear-coin-master-gratis_GM406889139.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/www-free-robux-com_GM431946152.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/claim-coin-master-free-spins_GM406889139.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/how-to-hack-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b56.bin
7c3cef3880105b022499e8d7702060857465feca3d2e8b8f417319410e564400		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B56 24156 bytes
font_01_sfnt_off00008295.bin
783aaa6655ee4cc9bd4a656e8e37c8d4eb14647635af9e14ecd033d001f0503d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8295 17884 bytes

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