Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9d9f80ae6403004…

MALICIOUS

PDF

36.1 KB Created: 2021-06-19 01:47:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d051ce99bc6b93d5b51a1b54a28d67b2 SHA-1: 5399d48ca1aa48b9ce8053ac26c049fbf59a9c36 SHA-256: c9d9f80ae64030044c564247ae4f5cb25450ee716f04966f0be1146cda33bfaf
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous embedded URLs, many of which are structured as SEO-optimized links pointing to game-related hacks and cheats. The ML classifier strongly flagged this PDF as malicious, and the presence of a "download button" heuristic further suggests a malicious workflow. The document's content and structure indicate it's designed to trick users into downloading further malicious content, likely through the provided links.

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/dungeon-quest-roblox-item-hack-game-hack
    • http://easytransferbrazil.com/images/is-minecraft-free_GM479516143.pdf
    • http://easytransferbrazil.com/images/minecraft-hacks-wurst_GM479516143.pdf
    • http://easytransferbrazil.com/images/roblox-free-play-no-download_GM431946152.pdf
    • http://easytransferbrazil.com/images/how-to-earn-robux-for-free-2021_GM431946152.pdf
    • http://easytransferbrazil.com/images/free-robux-by-watching-ads_GM431946152.pdf
    • http://easytransferbrazil.com/images/hack-coin-master-no-human-verification_GM406889139.pdf
    • http://easytransferbrazil.com/images/free-coins-and-spins_GM406889139.pdf
    • http://easytransferbrazil.com/images/get-free-spins-coin-master_GM406889139.pdf
    • http://easytransferbrazil.com/images/websites-to-get-free-robux_GM431946152.pdf
    • http://easytransferbrazil.com/images/how-to-hack-people-on-roblox-2021_GM431946152.pdf
    • http://easytransferbrazil.com/images/free-spins-and-coins-coin-master_GM406889139.pdf
    • http://easytransferbrazil.com/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://easytransferbrazil.com/images/free-robux-2021_GM431946152.pdf
    • http://easytransferbrazil.com/images/coin-master-daily-free-spins-haktuts_GM406889139.pdf
    • http://easytransferbrazil.com/images/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdf
    • http://easytransferbrazil.com/images/roblox-top_GM431946152.pdf
    • http://easytransferbrazil.com/images/how-to-get-free-spins-in-coin-master_GM406889139.pdf
    • http://easytransferbrazil.com/images/how-to-hack-roblox-on-mobile_GM431946152.pdf
    • http://easytransferbrazil.com/images/how-to-setup-a-minecraft-server-for-free_GM479516143.pdf
    • http://easytransferbrazil.com/images/roblox-snow-shovelling-simulator-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003377.bin
a12a9a089cb7abef8cd81e6ebd7b7936be8bc4339654bc71ead428b3c9a4d4f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3377 23060 bytes
font_01_sfnt_off00006745.bin
f9354b5f6e2dae5d2da4e9bedb9b8e41f13903de5aa60736b23f5f5e02cbf44e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6745 19300 bytes

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