Malicious PDF — malware analysis report

Static analysis result for SHA-256 afa81e7fb63c011f…

MALICIOUS

PDF

34.8 KB Created: 2021-06-20 13:09:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 807a2b8dd49033dfa4c9f704b05abe2a SHA-1: 13b58ee6de54e5da2305330941b88b9628532ef0 SHA-256: afa81e7fb63c011f6b9f9c1b9bfd83d17ec3a3cccfa0e1cf5e6f569a02a66a6d
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which are presented as download lures for game-related cheats and currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a coordinated effort to direct users to potentially malicious sites. The ML classifier also strongly flagged this PDF as malicious.

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-avatar-customizer-free-game-hack
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/free-spins-on-coin-master-link_GM406889139.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/free-coin-master-spins-blog_GM406889139.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/minecraft-nintendo-switch-digital-code-free_GM479516143.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/free-coin-master-coins-and-spins_GM406889139.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/free-robux-games-on-roblox_GM431946152.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/wurst-download_GM479516143.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/pokemon-go-free-remote-raid-pass-march-2021_GM1094591345.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/moonactive-coin-master-free-spins_GM406889139.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/how-to-hack-roblox-accounts_GM431946152.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/how-to-get-free-views-on-tiktok_GM835599320.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/how-to-get-robux-without-paying_GM431946152.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/roblox-how-to-get-free-robux-no-hack-2021_GM431946152.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/how-to-get-free-robux-on-phone_GM431946152.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/haktuts-coin-master-free-daily-spins_GM406889139.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/free-spins-coin-master-blogspot_GM406889139.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/master-coin-hack-apk_GM406889139.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/how-to-change-your-name-for-free-roblox_GM431946152.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/apps-for-free-robux_GM431946152.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/roblox-hack-game_GM431946152.pdf
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/how-do-you-get-free-robux-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030fe.bin
4306f63a53fa64ff4587c74b2da0d8966564c7dcaa77a72db86fcbcb4007bd63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30FE 21980 bytes
font_01_sfnt_off00006191.bin
7ce19d3f8696a7c5e59d085ffe742be2607624fcfd1aaf7203fadcaa0ed8713c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6191 19472 bytes

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