Malicious PDF — malware analysis report

Static analysis result for SHA-256 684a57c9927d7f38…

MALICIOUS

PDF

42.5 KB Created: 2021-05-19 23:36:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 18be19b0fda3d1155e60e1faf5e67c7b SHA-1: d9bf40eec04764e6ddf39e40daa380e612a7dee7 SHA-256: 684a57c9927d7f38e4e51e41eca61b213cf132ed7ea651cdfb9840b3568653c7
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links, identified as a PDF_SEO_LINK_FARM heuristic, pointing to various websites. The document body and extracted URLs suggest a lure for free spins, game hacks, or similar content, likely to drive traffic to SEO spam or potentially malicious sites. The ML classifier also flagged this PDF as malicious with high confidence.

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/daily-free-spin-coin-master-link-game-hack
    • http://lib.mappifhui.org/repository/free-roblox-printables_GM431946152.pdf
    • http://lib.mappifhui.org/repository/can-you-download-minecraft-for-free_GM479516143.pdf
    • http://lib.mappifhui.org/repository/free-coins-and-spins-for-coin-master_GM406889139.pdf
    • http://lib.mappifhui.org/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdf
    • http://lib.mappifhui.org/repository/free-robux-that-actually-works_GM431946152.pdf
    • http://lib.mappifhui.org/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdf
    • http://lib.mappifhui.org/repository/unlimited-coin-master-free-spins_GM406889139.pdf
    • http://lib.mappifhui.org/repository/coin-master-hack-apk-no-fb-login_GM406889139.pdf
    • http://lib.mappifhui.org/repository/try-minecraft-free_GM479516143.pdf
    • http://lib.mappifhui.org/repository/coin-master-free-coins-link_GM406889139.pdf
    • http://lib.mappifhui.org/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdf
    • http://lib.mappifhui.org/repository/free-gold-cards-for-coin-master_GM406889139.pdf
    • http://lib.mappifhui.org/repository/coin-master-unlimited-spin-hack_GM406889139.pdf
    • http://lib.mappifhui.org/repository/minecraft-java-edition-free_GM479516143.pdf
    • http://lib.mappifhui.org/repository/coin-master-32-mod-hack-apk-download_GM406889139.pdf
    • http://lib.mappifhui.org/repository/free-robux-promo-codes-2021_GM431946152.pdf
    • http://lib.mappifhui.org/repository/free-spin-coin-master-game_GM406889139.pdf
    • http://lib.mappifhui.org/repository/free-robux-thumbnail_GM431946152.pdf
    • http://lib.mappifhui.org/repository/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdf
    • http://lib.mappifhui.org/repository/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a12.bin
4a03e168929228c97bb1a348ab41586b2952be45e24953df06e2398ec060e679		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A12 25124 bytes
font_01_sfnt_off00008375.bin
13087f23ced5a654764a402ace47e06b7ceeb886891228a443e0cb07dd9c4176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8375 18476 bytes

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