Malicious PDF — malware analysis report

Static analysis result for SHA-256 1abe5886b4704b42…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 09:14:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 11b39017b8c0b70909ac11b2f379d007 SHA-1: a72ef7f34429090201c70d9a3e6aa81534a401d0 SHA-256: 1abe5886b4704b420d84666dcf074db2e155411d3c6dbe130ec356b3175f2d65
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a prominent external URI, all related to game cheats and hacks for popular games like Coin Master and Roblox. The heuristic firings indicate a link farm designed for SEO manipulation and a high ML classification score, strongly suggesting malicious intent. The document's purpose appears to be to lure users to these external sites, likely for malware distribution or phishing.

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-500-free-spins-game-hack
    • http://pustaka.fateta.unand.ac.id/repository/roblox-hack-site_GM431946152.pdf
    • http://pustaka.fateta.unand.ac.id/repository/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdf
    • http://pustaka.fateta.unand.ac.id/repository/can-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://pustaka.fateta.unand.ac.id/repository/free-girl-stuff-on-roblox_GM431946152.pdf
    • http://pustaka.fateta.unand.ac.id/repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdf
    • http://pustaka.fateta.unand.ac.id/repository/how-to-get-free-robux-on-phone_GM431946152.pdf
    • http://pustaka.fateta.unand.ac.id/repository/how-to-get-free-admin-in-roblox_GM431946152.pdf
    • http://pustaka.fateta.unand.ac.id/repository/free-robux-quote_GM431946152.pdf
    • http://pustaka.fateta.unand.ac.id/repository/bloxawards-com-earn-free-robux_GM431946152.pdf
    • http://pustaka.fateta.unand.ac.id/repository/roblox-free-play-no-app_GM431946152.pdf
    • http://pustaka.fateta.unand.ac.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdf
    • http://pustaka.fateta.unand.ac.id/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdf
    • http://pustaka.fateta.unand.ac.id/repository/free-spins-october-28-2021-coin-master_GM406889139.pdf
    • http://pustaka.fateta.unand.ac.id/repository/free-online-roblox-login_GM431946152.pdf
    • http://pustaka.fateta.unand.ac.id/repository/coin-master-hack-apk-download-2021_GM406889139.pdf
    • http://pustaka.fateta.unand.ac.id/repository/glitch-that-gets-u-free-robux_GM431946152.pdf
    • http://pustaka.fateta.unand.ac.id/repository/microsoft-bing-robux_GM431946152.pdf
    • http://pustaka.fateta.unand.ac.id/repository/how-to-get-2021-robux-for-free-proof_GM431946152.pdf
    • http://pustaka.fateta.unand.ac.id/repository/haktuts-coin-master-free-spins-2021_GM406889139.pdf
    • http://pustaka.fateta.unand.ac.id/repository/roblox-hack-no-verification-at-all_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031b0.bin
0f2baaf5ca2051f41412405718545f782b3db332be8c6f58e1ca88582d22c664		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31B0 22900 bytes
font_01_sfnt_off000064f6.bin
b4faaa02a719e70dd2d7ac4c5260ee5fa609bcbd6a666870f8035250f51f6b31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64F6 18480 bytes

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