Malicious PDF — malware analysis report

Static analysis result for SHA-256 f757b9070cb1f16b…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 18:41:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b70688e3e8643b8065df41e4e27ee5fb SHA-1: 3719f5dd0ec4b67ea1c0f5d0f38db0a295a9abb4 SHA-256: f757b9070cb1f16bfe20f6a1c09c586cd1781780783081679da5c8f06cdf7fe4
102 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, identified as a link farm, that direct users to websites offering 'free' game currency or hacks. The primary lure appears to be related to Roblox and Coin Master. The ML classifier strongly indicated maliciousness, and the presence of a download button heuristic further supports a malicious intent to trick users into navigating to potentially harmful external sites.

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/431946152/how-do-you-get-free-roblox-game-hack
    • http://www.library.umbjm.ac.id/repository/hacks-to-get-free-robux_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/hack-electric-state-darkrp-beta-roblox-2021_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/free-roblox-adopt-me-pets_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/how-do-you-earn-robux_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/coin-master-spin-ml-link_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-apk-app_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/free-robux-not-fake_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/comment-hacker-le-jeux-roblox-sur-buku-no-roblox_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/coin-master-free-coins-hack_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/114-hacks_GM479516143.pdf
    • http://www.library.umbjm.ac.id/repository/roblox-hack-ninja-simulator_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/hacks-tools-para-roblox_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/comment-avoir-des-roblox-gratuitement-sans-hack_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/roblox-money-hack-apk_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/how-to-get-free-faces-on-roblox_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/get-bucks-free-roblox_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/free-robux-with-no-verification-2021_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/coin-master-golden-cards-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000316e.bin
a86fda0ea2317959195f8b764031a6dd9d864872b5acabb0c78e3dab9d270ac9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x316E 22820 bytes
font_01_sfnt_off000064c9.bin
ad78cfc62cd8c1b058715f2dc66a6bf5ac5c09636f1ae08381e96b56faa7ef77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64C9 19388 bytes

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