Malicious PDF — malware analysis report

Static analysis result for SHA-256 f22c783528260fba…

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 09:23:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 82204340694e59bebf6728fa1d10366d SHA-1: 6202b0914b5fc0f6abb823736e7c173db1282b1f SHA-256: f22c783528260fbadb114b6e41ccaf3a3e8d3d0517f41c639742edecaedddc02
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, identified as a link farm, that direct users to sites offering game hacks and free in-game currency. The ML classifier strongly flagged this PDF as malicious, and the presence of a 'download button' lure further supports a malicious intent. The primary goal appears to be redirecting users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/406889139/juego-hackeado-de-coin-master-game-hack
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/coin-master-free-spins-link-blogspot_GM406889139.pdf
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/free-roebucks-no-human-verification_GM431946152.pdf
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/free-robux-no-verification-no-download-2021_GM431946152.pdf
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/coin-master-hack-root_GM406889139.pdf
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/coin-master-game-hack-app-download_GM406889139.pdf
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/roblox-com-hack_GM431946152.pdf
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/minecraft-wurst-hacked-client_GM479516143.pdf
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/free-spin-and-win-coin-master_GM406889139.pdf
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/pokmon-go-free-download-apk_GM1094591345.pdf
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/free-robux-now_GM431946152.pdf
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/lastrick-com-coin-master-hack_GM406889139.pdf
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/coin-master-free-in-app-purchases_GM406889139.pdf
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/free-roblox-accounts-with-robux_GM431946152.pdf
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/free-robux-please_GM431946152.pdf
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/free-robux-generator-for-kids_GM431946152.pdf
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/coin-master-gold-cards-free_GM406889139.pdf
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/play-roblox-for-free-on-google_GM431946152.pdf
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/free-robux-just-enter-username-and-password_GM431946152.pdf
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/free-robux-live_GM431946152.pdf
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/roblox-ftw_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000543a.bin
253d8d48eb1350f302daae00caf9ffe46fa71bb1880c3bce709eba223fe6c6f5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x543A 25148 bytes
font_01_sfnt_off00008df6.bin
e8c9da89df0fd7ae09b27778bbdced4cbf3d472d54c646d402828623a8476954		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF6 18652 bytes

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