Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfafb6e756b9fd4d…

MALICIOUS

PDF

46.6 KB Created: 2021-05-20 05:15:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3a5479021ebc4a3b00fe0f64c68a1603 SHA-1: 2fb756535540734cef534972507f73523355979d SHA-256: dfafb6e756b9fd4d7d4252945fba5aed1d3547464d0ccc85562e9e3986ad9173
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which are structured as a "link farm" to SEO-optimized PDF files. The document body and extracted URLs suggest a lure related to "Free Robux" and game hacks, likely intended to trick users into downloading malware. The presence of a "download button" heuristic further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/free-robux-wheel-game-hack
    • http://lib.smpn1bambanglipuro.sch.id/repository/free-roblox-injector_GM431946152.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/minecraft-for-free-on-phone_GM479516143.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/free-robux-apk_GM431946152.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/how-to-get-free-robux_GM431946152.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/daily-free-spins-coin-master-2021_GM406889139.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/2021-no-human-verification-hack-for-coin-master_GM406889139.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/free-robux-generator-com-roblox-hack_GM431946152.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/minecraft-free-apk-java-edition_GM479516143.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/official-coin-master-free-spins_GM406889139.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/free-coin-master-spin-generator_GM406889139.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/roblox-hack-me-robux_GM431946152.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/how-do-i-get-free-robux_GM431946152.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/coin-master-free-coin-and-spin-app_GM406889139.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/free-spin-coin-master-new-link_GM406889139.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/coin-master-unlimited-free-spins_GM406889139.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/coin-master-free-2021-spin-link-today_GM406889139.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/coin-master-free-pet-snacks_GM406889139.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/minecraft-auto-miner-hack_GM479516143.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/roblox-avatar-maker-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004aad.bin
34de61e85bde908143b12d062f63c634b0ef09e6bdd73ab61c8f29299d8a2295		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AAD 27240 bytes
font_01_sfnt_off00008961.bin
77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8961 2832 bytes
font_02_sfnt_off00009312.bin
2e7982e98076b23ded81992615fd9156783bf43ce379c6908e3793bc8f10067b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9312 18452 bytes

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