Malicious PDF — malware analysis report

Static analysis result for SHA-256 104db94e03f2b5d1…

MALICIOUS

PDF

46.0 KB Created: 2021-06-04 00:09:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 79c5a790d47520014261ed569226b87e SHA-1: dbb6bd92db6d864c20e843fde5565e0978967cfd SHA-256: 104db94e03f2b5d1aad7e8fe9ace09f11cf05e2762d834b15a2feb913686f459
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are related to game cheats and in-game currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these external links, suggesting a link farm designed to attract users searching for such content. The ML classifier also flagged this PDF as malicious with high confidence. The primary attack pattern involves luring users to click these links, likely leading to malicious websites or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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.online/app/406889139/how-to-get-free-spins-on-coin-master-ios-game-hack
    • http://elibrary.uinbanten.ac.id/repository/coin-master-spins-and-coins_GM406889139.pdf
    • http://elibrary.uinbanten.ac.id/repository/minecraft-aimbot_GM479516143.pdf
    • http://elibrary.uinbanten.ac.id/repository/hack-robux_GM431946152.pdf
    • http://elibrary.uinbanten.ac.id/repository/roblox-cheats-for-escape-super-clowns_GM431946152.pdf
    • http://elibrary.uinbanten.ac.id/repository/coin-master-hack-apk-app_GM406889139.pdf
    • http://elibrary.uinbanten.ac.id/repository/mangocheats-com-hack-coin-master-cheat_GM406889139.pdf
    • http://elibrary.uinbanten.ac.id/repository/coin-master-mod-version-free-download_GM406889139.pdf
    • http://elibrary.uinbanten.ac.id/repository/free-robux-games-that-actually-work-2021_GM431946152.pdf
    • http://elibrary.uinbanten.ac.id/repository/coin-master-daily-free-spin-app_GM406889139.pdf
    • http://elibrary.uinbanten.ac.id/repository/hack-coin-master-apk-download_GM406889139.pdf
    • http://elibrary.uinbanten.ac.id/repository/coin-master-free-spins-without-verification_GM406889139.pdf
    • http://elibrary.uinbanten.ac.id/repository/free-robux-no-human-verification-no-survey_GM431946152.pdf
    • http://elibrary.uinbanten.ac.id/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdf
    • http://elibrary.uinbanten.ac.id/repository/wwwcoin-master-hack-game-download_GM406889139.pdf
    • http://elibrary.uinbanten.ac.id/repository/robux-free-co_GM431946152.pdf
    • http://elibrary.uinbanten.ac.id/repository/roblox-games-com-free_GM431946152.pdf
    • http://elibrary.uinbanten.ac.id/repository/free-spins-coin-master-2021-hack_GM406889139.pdf
    • http://elibrary.uinbanten.ac.id/repository/inappropriate-roblox-games_GM431946152.pdf
    • http://elibrary.uinbanten.ac.id/repository/wahoogaming-co-free-robux_GM431946152.pdf
    • http://elibrary.uinbanten.ac.id/repository/free-robux-real-working_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050a4.bin
706f3932c19ce6a606533f15a593832e67dda60258f521970631dcfc35001da0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50A4 24236 bytes
font_01_sfnt_off000087b7.bin
b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87B7 2880 bytes
font_02_sfnt_off000091a2.bin
751b5bf5e2baa224d49100cdcfdcfacb8a421785831d1efd4091db32238aca98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91A2 18052 bytes

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