Malicious PDF — malware analysis report

Static analysis result for SHA-256 33733aaa3ac35658…

MALICIOUS

PDF

40.2 KB Created: 2021-05-16 01:40:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9472f8f7feff0af7a3e8907bf90b7e5e SHA-1: a847e63a7dfd2c4ef7621570ac653ee862dae46d SHA-256: 33733aaa3ac356589c4aadd16f0a3b1760a147db239b369c45cb95ca4b5eea61
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which are related to game cheats and hacks, suggesting a lure for users seeking such content. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs indicates an attempt to redirect the user to potentially harmful sites. The document body, though heavily obfuscated, contains a URL that aligns with the overall theme of game rewards.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-rewards-game-hack
    • http://pustaka.fateta.unand.ac.id/repository/free-robux-discord_GM431946152.pdf
    • http://pustaka.fateta.unand.ac.id/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdf
    • http://pustaka.fateta.unand.ac.id/repository/8bp-hack-coin-master_GM406889139.pdf
    • http://pustaka.fateta.unand.ac.id/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdf
    • http://pustaka.fateta.unand.ac.id/repository/robux-generator-without-verification_GM431946152.pdf
    • http://pustaka.fateta.unand.ac.id/repository/coin-master-ios-gods-hack_GM406889139.pdf
    • http://pustaka.fateta.unand.ac.id/repository/minecraft-hacked-client-112-2_GM479516143.pdf
    • http://pustaka.fateta.unand.ac.id/repository/minecraft-pocket-edition-apk-free-download_GM479516143.pdf
    • http://pustaka.fateta.unand.ac.id/repository/twitter-coin-master-free-spins_GM406889139.pdf
    • http://pustaka.fateta.unand.ac.id/repository/free-robux-hack-no-verification_GM431946152.pdf
    • http://pustaka.fateta.unand.ac.id/repository/free-spin-coin-master-game_GM406889139.pdf
    • http://pustaka.fateta.unand.ac.id/repository/best-site-for-free-coin-master-free-spin-link_GM406889139.pdf
    • http://pustaka.fateta.unand.ac.id/repository/claim-free-robux_GM431946152.pdf
    • http://pustaka.fateta.unand.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://pustaka.fateta.unand.ac.id/repository/coin-master-free-spins-and-coins-today_GM406889139.pdf
    • http://pustaka.fateta.unand.ac.id/repository/free-coin-master-spins-no-verification_GM406889139.pdf
    • http://pustaka.fateta.unand.ac.id/repository/hack-master-coin_GM406889139.pdf
    • http://pustaka.fateta.unand.ac.id/repository/smart-lodhi-coin-master-hack_GM406889139.pdf
    • http://pustaka.fateta.unand.ac.id/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdf
    • http://pustaka.fateta.unand.ac.id/repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000461b.bin
a590549dd1ab3637a9d65bc41a5dd31d8295dbe03c44fecef98a234516fd5964		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x461B 23520 bytes
font_01_sfnt_off00007b6e.bin
acbd2960432ed6aaee9cffad063da1b3d43b5b4e200ce15de4e80cb136e5b59b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6E 17884 bytes

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