Malicious PDF — malware analysis report

Static analysis result for SHA-256 7898ae5753fb763c…

MALICIOUS

PDF

35.5 KB Created: 2021-06-25 22:43:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f2f849856cb03e9371a1a1f96099d8aa SHA-1: aa96d4ed3b86d53b8de2c81823229bd7bd02664e SHA-256: 7898ae5753fb763cb2db4f219493c610d334c56e12b37a852adca5f3491fb3d5
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded URLs, many of which are structured as SEO-optimized links pointing to resources related to free in-game items or currency. The ML classifier strongly flagged this PDF as malicious, and the presence of a "download button" heuristic suggests a deceptive user interface. The primary URL, http://netcdn.co/app/431946152/free-skin-tutorial-roblox-strucid-game-hack, likely serves as a landing page for a phishing or malware distribution scheme.

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/free-skin-tutorial-roblox-strucid-game-hack
    • http://pustaka.fti.unand.ac.id//repository/how-to-get-free-robux-no-scam_GM431946152.pdf
    • http://pustaka.fti.unand.ac.id//repository/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://pustaka.fti.unand.ac.id/repository/abstract-free-roblox_GM431946152.pdf
    • http://pustaka.fti.unand.ac.id/repository/casper-hack-roblox-jailbreak-noclip_GM431946152.pdf
    • http://pustaka.fti.unand.ac.id/repository/150-free-spins-coin-master_GM406889139.pdf
    • http://pustaka.fti.unand.ac.id/repository/lucky-patcher-free-robux_GM431946152.pdf
    • http://pustaka.fti.unand.ac.id/repository/comment-avoir-un-cheat-sur-roblox_GM431946152.pdf
    • http://pustaka.fti.unand.ac.id/repository/pokemon-go-free-3-remote-raid-pass_GM1094591345.pdf
    • http://pustaka.fti.unand.ac.id//repository/free-spins-for-coin-master-hack_GM406889139.pdf
    • http://pustaka.fti.unand.ac.id//repository/free-robux-no-verification-2021_GM431946152.pdf
    • http://pustaka.fti.unand.ac.id/repository/free-minecraft-server-hosting-with-plugins_GM479516143.pdf
    • http://pustaka.fti.unand.ac.id//repository/coin-master-daily-free-spins-link-app_GM406889139.pdf
    • http://pustaka.fti.unand.ac.id/repository/blogspot-free-spins-coin-master_GM406889139.pdf
    • http://pustaka.fti.unand.ac.id//repository/javascript-free-robux_GM431946152.pdf
    • http://pustaka.fti.unand.ac.id//repository/can-u-get-free-robux_GM431946152.pdf
    • http://pustaka.fti.unand.ac.id/repository/roblox-gift-card-generator-free_GM431946152.pdf
    • http://pustaka.fti.unand.ac.id/repository/roblox-free-no-download_GM431946152.pdf
    • http://pustaka.fti.unand.ac.id//repository/free-links-for-coin-master-2021_GM406889139.pdf
    • http://pustaka.fti.unand.ac.id/repository/roblox-hack-how-to-get-evrything-free-on-catalog_GM431946152.pdf
    • http://pustaka.fti.unand.ac.id/repository/your-free-trial-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032b7.bin
a39d4b10a93f4291ff7c337f71ef79a5cca57b21aa615ae4233c21c770d6d150		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32B7 22456 bytes
font_01_sfnt_off000064e3.bin
10a91ac823b8d3d41f174c517ab01589cf494737aa9c34f65d3074ccbda0835a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E3 19356 bytes

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