Malicious PDF — malware analysis report

Static analysis result for SHA-256 936d930793fd7f5f…

MALICIOUS

PDF

33.8 KB Created: 2021-06-19 03:26:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ef12adbc6a37c5130568b04eb0c3da68 SHA-1: ab04214b3cba2b5094dd5202df2ebf851ecb5edc SHA-256: 936d930793fd7f5fa4366c4ae32cfed07770c77b357be8954ccd54c04cf60dd3
82 Risk Score

Malware Insights

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

The PDF document contains a lure for free Robux, which is a common theme for scams. It includes a heuristic firing for a clipboard command execution lure, indicating the user is prompted to paste commands into a shell. Additionally, a URL pointing to a potential payload download is embedded within the document. The ML classifier also flagged this PDF as malicious with high confidence.

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/roblox-games-to-get-free-robux-game-hack PDF link annotation
    • https://dirigentigiustizia.it/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/www-free-robux-club_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/hack-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-free-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-33-hack-version-download_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/minecraft-pe-free-download-android_GM479516143.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-robux-co_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/robux-com-free_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/auto-rap-battles-roblox-hack_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-robux-codes-2021-not-used_GM431946152.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_off00002d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D2C 22324 bytes
SHA-256: 17d12184e54750d042f26b6859ba716939237b7d8477847ac4c9d34c2e7f294a
font_01_sfnt_off00005f27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F27 18968 bytes
SHA-256: 64562636755d4b122aff59527d3593c8c4762833f3defe992e00e5bfc51a1b18

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