Malicious PDF — malware analysis report

Static analysis result for SHA-256 f18755288ed6c047…

MALICIOUS

PDF

34.5 KB Created: 2021-06-25 23:20:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a9c64689c6ba114ef98b72d42378a7b3 SHA-1: 30e31eea825ebd0779e6a3c9c00e6a3f3b155ef4 SHA-256: f18755288ed6c0474e46e034ebe5866dfe7ea28e7806bfcdff4c22f22f40c8bf
82 Risk Score

Malware Insights

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

The document contains lures for obtaining free in-game items, such as Robux and Coin Master spins, and includes a high-severity heuristic indicating a clipboard command execution lure. This suggests the document is designed to trick users into copying and pasting commands into their system, likely to download and execute a second-stage payload from the embedded URL http://netcdn.co/app/431946152/how-dt-oget-free-robux-and-free-catilog-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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/how-dt-oget-free-robux-and-free-catilog-game-hack PDF link annotation
    • https://www.bumbar-sport.hr/files/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/roblox-hack-generaort_GM431946152.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/coin-master-free-spins-ios-2021_GM406889139.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/coins-master-hack_GM406889139.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/how-to-get-free-robux-for-real-2021_GM431946152.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/what-is-a-robux_GM431946152.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F56 22128 bytes
SHA-256: db77d2d73280bd9e67a73159c9eac51a1c55c19f0b63021a97313b1ab6dcf8c1
font_01_sfnt_off0000602c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x602C 19520 bytes
SHA-256: 5730bf1028910b9261bbcb6000be686e84e15776c05ae8877c1b4aca41324fd8

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