Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab9b525fc35f1da0…

MALICIOUS

PDF

42.6 KB Created: 2021-05-16 09:52:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c53c4470c4e5b56f43111cfa5d52f873 SHA-1: a3ee89751c96803a466815e77247848845fd0f2e SHA-256: ab9b525fc35f1da09e46e4aa6199a2a644a37b3ff70522e8c41ca0edbf6ef7ee
82 Risk Score

Malware Insights

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

This PDF document exhibits strong indicators of malicious intent, including a high ML classifier score and heuristics flagging it as a browser extension/update installation lure. The document body and embedded URLs suggest a social engineering tactic to trick users into downloading a file, likely a game hack or cheat, which is a common method for distributing malware. The presence of multiple suspicious URLs points to a distribution network for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.xyz/app/431946152/roblox-login-hack-game-hack
    • http://hk-kan.org/images/free-robux-sites-2021_GM431946152.pdf
    • http://hk-kan.org/images/hack-download_GM431946152.pdf
    • http://hk-kan.org/images/coin-master-hack-lost-world-2021_GM406889139.pdf
    • http://hk-kan.org/images/free-robux-by-watching-ads_GM431946152.pdf
    • http://hk-kan.org/images/free-robux-no-verification-2021_GM431946152.pdf
    • http://hk-kan.org/images/coin-master-free-spins-link-whatsapp-group_GM406889139.pdf
    • http://hk-kan.org/images/minecraft-java-hacks_GM479516143.pdf
    • http://hk-kan.org/images/free-promo-codes-roblox_GM431946152.pdf
    • http://hk-kan.org/images/free-roblox-generator_GM431946152.pdf
    • http://hk-kan.org/images/how-to-get-robux-for-free-2021_GM431946152.pdf
    • http://hk-kan.org/images/2021-no-human-verification-hack-for-coin-master_GM406889139.pdf
    • http://hk-kan.org/images/robux-hack-generator_GM431946152.pdf
    • http://hk-kan.org/images/coin-master-60-spins_GM406889139.pdf
    • http://hk-kan.org/images/coin-master-gold-cards-free-2021_GM406889139.pdf
    • http://hk-kan.org/images/hacked-roblox-accounts-list_GM431946152.pdf
    • http://hk-kan.org/images/free-spins-coin-master-app-ios_GM406889139.pdf
    • http://hk-kan.org/images/spin-and-coin-link_GM406889139.pdf
    • http://hk-kan.org/images/is-there-any-way-to-get-free-robux_GM431946152.pdf
    • http://hk-kan.org/images/free-robux-apk_GM431946152.pdf
    • http://hk-kan.org/images/play-roblox-free-online_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000479d.bin
1ea7c2dc89e4137874369bf6ed304248cd7d8c8131249f5a090052aedb6ac3c0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x479D 26112 bytes
font_01_sfnt_off00008350.bin
4594c9d52aa6913ba89b547defae6e50b5d648d55ef93ab0faf484389542556d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8350 18592 bytes

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