Malicious PDF — malware analysis report

Static analysis result for SHA-256 9114890f22423500…

MALICIOUS

PDF

34.8 KB Created: 2021-06-25 22:56:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fab867ca0ba820c0d22262907f483969 SHA-1: ad0323d7dc783f45e5529fe0be3e3433fd785ecc SHA-256: 9114890f22423500c19e03c241ba8715d07b72c7285797676344c152a8552ec5
122 Risk Score

Malware Insights

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

The PDF document contains lures consistent with social engineering attacks, specifically instructing the user to interact with the clipboard and execute commands via Win+R or a terminal. This suggests an attempt to trick the user into running a malicious payload, likely downloaded from one of the embedded URLs. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-to-hack-people-on-roblox-2021-game-hack
    • https://www.nationalmilklaboratories.co.uk/uploads/files/files/roblox-games-with-free-boombox_GM431946152.pdf
    • https://www.nationalmilklaboratories.co.uk/uploads/files/files/roblox-jailbreak-hack-download_GM431946152.pdf
    • https://www.nationalmilklaboratories.co.uk/uploads/files/files/oneapprewards-free-robux_GM431946152.pdf
    • https://www.nationalmilklaboratories.co.uk/uploads/files/files/animate-a-roblox-character-online-free_GM431946152.pdf
    • https://www.nationalmilklaboratories.co.uk/uploads/files/files/get-free-cards-coin-master_GM406889139.pdf
    • https://www.nationalmilklaboratories.co.uk/uploads/files/files/coin-master-free-spins-link-app-download_GM406889139.pdf
    • https://www.nationalmilklaboratories.co.uk/uploads/files/files/best-minecraft-hacked-client-2021_GM479516143.pdf
    • https://www.nationalmilklaboratories.co.uk/uploads/files/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdf
    • https://www.nationalmilklaboratories.co.uk/uploads/files/files/how-to-hack-roblox-games-no-download_GM431946152.pdf
    • https://www.nationalmilklaboratories.co.uk/uploads/files/files/free-mojang-account-with-minecraft_GM479516143.pdf
    • https://www.nationalmilklaboratories.co.uk/uploads/files/files/how-to-get-free-coins-in-minecraft_GM479516143.pdf
    • https://www.nationalmilklaboratories.co.uk/uploads/files/files/minecraft-bedrock-edition-pc-download-free_GM479516143.pdf
    • https://www.nationalmilklaboratories.co.uk/uploads/files/files/coin-master-hack-club_GM406889139.pdf
    • https://www.nationalmilklaboratories.co.uk/uploads/files/files/coin-master-2021_GM406889139.pdf
    • https://www.nationalmilklaboratories.co.uk/uploads/files/files/what-do-points-do-in-roblox_GM431946152.pdf
    • https://www.nationalmilklaboratories.co.uk/uploads/files/files/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdf
    • https://www.nationalmilklaboratories.co.uk/uploads/files/files/free-spins-for-coin-master-app_GM406889139.pdf
    • https://www.nationalmilklaboratories.co.uk/uploads/files/files/free-roblox-animations_GM431946152.pdf
    • https://www.nationalmilklaboratories.co.uk/uploads/files/files/coin-master-links-to-get-free-spins_GM406889139.pdf
    • https://www.nationalmilklaboratories.co.uk/uploads/files/files/free-robuxs-app_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003287.bin
1af9351f81759d0f2c844ec7366d16f7e527065ec3a8d161039bccd6effc6266		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3287 21416 bytes
font_01_sfnt_off00006114.bin
a9a4be406c790a49d216c27ed8fbdb2a8a4ba3e7e923ae3bb88342ec9bdb6bd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6114 19552 bytes

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