Malicious PDF — malware analysis report

Static analysis result for SHA-256 1838499b756b6ebf…

MALICIOUS

PDF

43.3 KB Created: 2021-06-03 09:29:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 72e508a22d618df578b179a8a28a865c SHA-1: d8c8404da3c4c5df35a6f3234d80d2355d31f12b SHA-256: 1838499b756b6ebf835106f5269caa8f21fd1abd6e3b4a230730c553ac9fe985
122 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is designed to trick users into executing commands, consistent with ClickFix social engineering attacks. The document body, though partially garbled, references 'free Robux' and includes a URL that likely leads to a malicious payload. The presence of a direct URL and the social engineering lures suggest an attempt to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/how-do-you-get-free-robux-on-roblox-game-hack
    • http://e-pustaka.stkipadzkia.ac.id/repository/hack-download_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/how-to-get-free-skins-in-roblox_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/roblox-gift-card-for-free_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-robux-com-roblox_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-coin-master-gift-link_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/hacks-to-get-free-robux_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-free-spins-and-coins-link-today_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/pasos-para-hackear-coins-master_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/spins-coin-master_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/master-free-spin-and-coin-link_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/how-to-hack-coin-master-pc_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-account-roblox-with-robux_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/hack-coin-master-game-apk_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/how-to-get-free-robux-in-2021_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/roblox-land-free-robux_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/minecraft-book-collection_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e02.bin
a991304dc7be2ed0b50293b51470a0dfa1548cb3165cc5f095706ed65931a164		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E02 24144 bytes
font_01_sfnt_off0000850f.bin
1a1edbb4620230d43f84097700922ea11c75fa5ad69815b80eb1b16329c7dce0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x850F 18688 bytes

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