Malicious PDF — malware analysis report

Static analysis result for SHA-256 d321fbf8f195e4d4…

MALICIOUS

PDF

33.0 KB Created: 2021-07-06 17:21:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2681cfd735e0d8261d1463b7c575a155 SHA-1: 45a577c5714d95ff9e6ad0496d0b6b314246a5e6 SHA-256: d321fbf8f195e4d4d6cfc52b961e4a7777485810d0883d65b79b37578dc2663e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are related to game hacks and cheats for popular games like Roblox and Coin Master. The ML classifier strongly indicated maliciousness, and the presence of a link farm heuristic further supports this. The document likely serves as a lure to direct users to potentially malicious sites that could host malware or phishing content.

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.tw/app/406889139/coinmasterfreespins-game-hack
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/free-admin-2021-roblox_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/easiest-ways-to-make-robux-on-roblox-for-free_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/play-games-for-free-robux_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/how-to-get-25-robux-for-free_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/how-to-hack-the-2nd-player-in-roblox_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/creator-hack-roblox_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/free-robux-2021-no-human-verification_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/pokemon-go-free-daily-remote-pass_GM1094591345.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/roblox-robux-generator-2021_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/new-claim-gg-promo-code-free-robux_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/coin-master-coin-hack_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/coin-master-free-spins-youthnow_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/coin-master-free-spins-facebook_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/hack-to-not-die-in-roblox_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/coin-master-hack-version-download-2021-android_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/roblox-high-school-cindering-hack_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/best-roblox-hacks-gui_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/coin-master-spins-hack-2021_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/coin-master-free-spins-hack-without-human-verification_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002de1.bin
a61cae5c18351641bb1c416a57c7869f139dd21e38878f3e350f866acc242ff7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DE1 21980 bytes
font_01_sfnt_off00005e6e.bin
07d1048110b648044dfdf05b80b578e3dafb2e438d2dd29495699789e7328ffb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E6E 18272 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.