Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aba9dc2d0cbea5e…

MALICIOUS

PDF

43.2 KB Created: 2021-05-15 22:33:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6dc0e85fbc64fc144f62ec09b329dfb7 SHA-1: 758b5f8c57b6ea687f1cde6162de41863fc81b8c SHA-256: 1aba9dc2d0cbea5e9ecfe5d012cb3e3e8a6b2738bac875283bb9dd40712f8554
122 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and heuristics indicating it's designed to trick users into executing commands. Specifically, it uses social engineering lures like 'ClickFix' and 'Clipboard command execution' to prompt the user to paste commands into a terminal, likely to download and run a second-stage payload such as a game hack. The primary URL points to a 'wurst-client' download, reinforcing this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.xyz/app/479516143/wurst-client-1.8-9-game-hack
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/coin-master-free-cards-hack_GM406889139.pdf
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/www-robux-com_GM431946152.pdf
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/coin-master-free-coins-and-spins_GM406889139.pdf
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/robux-only_GM431946152.pdf
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spin-reward-links_GM406889139.pdf
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/free-spins-and-coins-coin-master_GM406889139.pdf
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/what-do-roblox-points-do_GM431946152.pdf
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdf
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/minecraft-free-android_GM479516143.pdf
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/free-robux-no-human-verification-2021_GM431946152.pdf
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/robuxmatchcom-free-robux_GM431946152.pdf
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/coin-master-free-bonus_GM406889139.pdf
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/coin-master-today_GM406889139.pdf
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/get-free-robux-gg_GM431946152.pdf
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/gamesofficenet-hack-coin-master_GM406889139.pdf
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdf
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-and-free-coins_GM406889139.pdf
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/free-robux-2021-no-human-verification_GM431946152.pdf
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/get-2021-free-spins-on-coin-master_GM406889139.pdf
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/coin-master-cheats-without-verification_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d51.bin
02d7f16e14df4f8baf5d2625061ba50bc7653129227381cf02b990cadb735e1b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D51 25276 bytes
font_01_sfnt_off000086cb.bin
4d8ada0c5ac659fb49370babfb0317bee460cb2310b474ce078588896e89c849		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86CB 18296 bytes

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