Malicious PDF — malware analysis report

Static analysis result for SHA-256 1839107cccad0a15…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 01:52:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0f8f1e83c3e9b918a50888ca3a8f15e6 SHA-1: 6ae42c8eb3154a0cb07bd4ac134e380a26b740de SHA-256: 1839107cccad0a15462b8402ec177aad7cd99622526447ec7fb93dbe03473b1a
142 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 hacks and cheats for popular games like Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a link farm designed to attract users searching for these terms. The presence of 'cmd_GM431946152.pdf' in the document text, alongside a URL, suggests an attempt to execute commands or download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/daily-free-spins-coin-master-app-game-hack
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/roblox-hack-codes-for-robux_GM431946152.pdf
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/roblox-legendary-football-vip-server-free_GM431946152.pdf
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/is-minecraft-free-on-nintendo-switch_GM479516143.pdf
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/2021-roblox_GM431946152.pdf
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/arsenal-roblox-hack-script-pastebin_GM431946152.pdf
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/coin-master-free-coins-link_GM406889139.pdf
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/coin-master-daily-free-spins-link-today_GM406889139.pdf
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/coin-master-hack-mod-apk-35-8_GM406889139.pdf
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/minecraft-hack-client-download_GM479516143.pdf
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/bloxpage-free-robux_GM431946152.pdf
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/free-unused-roblox-accountsno-robux_GM431946152.pdf
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/how-to-hack-roblox-jailbreak_GM431946152.pdf
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/free-hockey-mask-roblox_GM431946152.pdf
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/how-to-hack-roblox-accounts-2021-using-cmd_GM431946152.pdf
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/coin-master-free-spins-2-5-2021_GM406889139.pdf
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/roblox-noclip-cheat-engine-lua_GM431946152.pdf
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/how-to-use-cheat-engine-on-roblox-retail-tycoon_GM431946152.pdf
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/free-haiir-roblox_GM431946152.pdf
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/cheat-roblox-windows-10-magnet-simulator-2021_GM431946152.pdf
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/www-roblox-com-free-robux_GM431946152.pdf
    • http://pustaka.ditjenpkh.pertanian.go.id
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030d6.bin
0b9742aace6bc39937e95f6f7eeb02c701a7697bde5623674ea03817bb200389		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30D6 23144 bytes
font_01_sfnt_off00006506.bin
b14aa08320e077b2d8ee80ae23911225b9b06fa740893d1d250ba0d53672be81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6506 18596 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.