Malicious PDF — malware analysis report

Static analysis result for SHA-256 c19c8bddb0e72afa…

MALICIOUS

PDF

43.5 KB Created: 2021-06-03 10:47:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c61e23bc01a86921faabdd0ff5607baa SHA-1: f3d34faedfad8e7abd7168d10cec0310b735bdfa SHA-256: c19c8bddb0e72afa52cc8ac6aeb5300bbc69c34fca88dfe55eec88980aee99eb
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links and a document body referencing game hacks and cheats, strongly suggesting a lure to download malicious content. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many of which are likely malicious or lead to malicious sites. The ML_NYX_PDF_MALICIOUS score further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9882

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/431946152/roblox-hacks-for-mac-game-hack
    • http://library.ft.upnvj.ac.id/repository/coin-master-hack-version-2021-free-download_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/how-can-i-get-free-robux_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/coin-master-daily-free-spin-and-coin-link_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/coin-master-free-cards-link-2021_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/rbxfree-com-free-robux_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/wurst-hacked-client_GM479516143.pdf
    • http://library.ft.upnvj.ac.id/repository/how-to-get-free-skins-in-roblox_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/free-tiktok-fans-no-human-verification-or-downloading-apps_GM835599320.pdf
    • http://library.ft.upnvj.ac.id/repository/free-robux-codes_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/free-diamonds-coin-master_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/how-to-get-minecraft-for-free-on-xbox_GM479516143.pdf
    • http://library.ft.upnvj.ac.id/repository/pokemon-go-free-mewtwo-hack_GM1094591345.pdf
    • http://library.ft.upnvj.ac.id/repository/free-spins-coin-master-links-2021_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/free-robux-no-verification-2021-android_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/robux-hack-me_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/coin-master-free-spins-link-today-hack_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/lastrick-com-coin-master-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f54.bin
93fc0763b33d57fe003dd62df18efe32833a81c6d5175fe78ffe62964f81950e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F54 24156 bytes
font_01_sfnt_off00008695.bin
b54d427420c2b6acb67d73efd488d39bfb4939947f3518d8bf7854551a24b695		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8695 18544 bytes

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