Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5217c0514c0de27…

MALICIOUS

PDF

35.5 KB Created: 2021-06-25 15:28:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 26199b64a850170ec40d84507ea6347c SHA-1: 526b45933ef3192e54c84d51f4a5783c8e9c55d4 SHA-256: c5217c0514c0de271db18f9dc20dcb3029b418c564e29c318085804b66340544
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is designed as a lure, presenting itself as a way to get free in-game currency or cheats for popular games. It contains numerous links to external PDFs, likely serving as a link farm or redirect mechanism to malicious sites. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' suggests the document attempts to trick the user into executing commands, possibly to download and run a second-stage payload.

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.
  • 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
  • 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.co/app/431946152/free-robux-no-download-or-survey-2021-game-hack
    • http://perpus.ar-rum.ac.id//repository/free-robux-generator-for-roblox-2021_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/roblox-games-to-play-for-free_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/how-to-hack-coin-master-spin_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/free-robux-glitch_GM431946152.pdf
    • http://perpus.ar-rum.ac.id/repository/is-nexusus-roblox-hack_GM431946152.pdf
    • http://perpus.ar-rum.ac.id/repository/roblox-team-change-script-pastebin-hacking_GM431946152.pdf
    • http://perpus.ar-rum.ac.id/repository/how-to-hack-into-a-roblox-account-2021-v3rmillion_GM431946152.pdf
    • http://perpus.ar-rum.ac.id/repository/free-robux-giver-2021_GM431946152.pdf
    • http://perpus.ar-rum.ac.id/repository/roblox-hack-get-unlimited-robux-for-free_GM431946152.pdf
    • http://perpus.ar-rum.ac.id/repository/red-boy-hack-roblox-jailbreak_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/is-roblox-hacked_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/is-minecraft-bedrock-edition-free_GM479516143.pdf
    • http://perpus.ar-rum.ac.id//repository/i-want-free-robux_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/free-spins-in-coin-master-without-human-verification_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/free-multiplayer-minecraft-server_GM479516143.pdf
    • http://perpus.ar-rum.ac.id//repository/free-spins-on-coin-master-hack_GM406889139.pdf
    • http://perpus.ar-rum.ac.id/repository/roblox-free-robux-generator-no-survey_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030ee.bin
d543f850c6226260002555d181341ab1e10ccf35a59d5e8a7c9ad9e280d37d19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30EE 22360 bytes
font_01_sfnt_off000062d6.bin
38cb834c331a575570cb029a076f55733b1bd9b9ad200dc4277234338a342383		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62D6 19992 bytes

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