Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6528cd8b1d7e90b…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 20:21:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 66a13ed8e6d66e71676355d03a2762a9 SHA-1: 403068cd1c8b18e3f7f30d86132dabd08023016c SHA-256: e6528cd8b1d7e90bb399a33ffb35b7b47bd3b593ee9e67ab616e4447c81f1dee
102 Risk Score

Malware Insights

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

The PDF contains numerous embedded links that lead to websites promising game hacks and free currency for popular games. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users with deceptive content. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is a phishing or scam document.

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.tw/app/406889139/coin-master-free-pet-food-links-game-hack
    • https://pustaka.widyakartika.ac.id/repository/free-minecraft-servers-to-join_GM479516143.pdf
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-free-gear-in-roblox-high-school_GM431946152.pdf
    • https://pustaka.widyakartika.ac.id/repository/como-hackear-coin-master_GM406889139.pdf
    • https://pustaka.widyakartika.ac.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdf
    • https://pustaka.widyakartika.ac.id/repository/how-to-hack-an-acount-on-roblox_GM431946152.pdf
    • https://pustaka.widyakartika.ac.id/repository/app-master_GM406889139.pdf
    • https://pustaka.widyakartika.ac.id/repository/how-to-hack-accounts-on-roblox-2021_GM431946152.pdf
    • https://pustaka.widyakartika.ac.id/repository/uprobuxcom-free-robux_GM431946152.pdf
    • https://pustaka.widyakartika.ac.id/repository/free-unlimited-coin-master-online-tool_GM406889139.pdf
    • https://pustaka.widyakartika.ac.id/repository/roblox-accounts-free-2021_GM431946152.pdf
    • https://pustaka.widyakartika.ac.id/repository/roblox-hack-tool-robux-and-tix-no-survey_GM431946152.pdf
    • https://pustaka.widyakartika.ac.id/repository/free-downloads-for-coin-master-daily-rewards_GM406889139.pdf
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdf
    • https://pustaka.widyakartika.ac.id/repository/complete-offers-for-robux_GM431946152.pdf
    • https://pustaka.widyakartika.ac.id/repository/coin-master-hack-no-verification-no-signup_GM406889139.pdf
    • https://pustaka.widyakartika.ac.id/repository/free-coins-spins-on-coin-master_GM406889139.pdf
    • https://pustaka.widyakartika.ac.id/repository/can-u-get-robux-for-free_GM431946152.pdf
    • https://pustaka.widyakartika.ac.id/repository/how-to-play-paid-roblox-games-for-free_GM431946152.pdf
    • https://pustaka.widyakartika.ac.id/repository/free-roblox-accounts-with-robux-october-2021_GM431946152.pdf
    • https://pustaka.widyakartika.ac.id/repository/free-robux-hack-no-verification-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033ea.bin
d7fbdec6ac488c50f29d3c24928faef230027ef74d27c2d1df4de2b3ffb1fc1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33EA 22664 bytes
font_01_sfnt_off00006679.bin
42320e27e2ff961517b3e3de4779e9c87c003b60669647e388f9880bb3e4a6bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6679 18496 bytes

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