Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b6c9b6da993fe45…

MALICIOUS

PDF

48.9 KB Created: 2021-06-14 00:54:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0e63694bb826d3a87fb37c73049c6e37 SHA-1: 40ae77476431669b4ac35e0f5a0160d763cfefd5 SHA-256: 3b6c9b6da993fe45b2c9c7870c3fb33512844ee092dd7cd2dafad72c25901c9a
122 Risk Score

Malware Insights

MITRE ATT&CK
T1059.003 Windows Command Shell T1566.001 Spearphishing Attachment

The document contains lures and embedded URLs designed to trick the user into executing commands, as indicated by the 'Clipboard command execution lure' and 'LOLBin token sequence' heuristics. The primary URL, http://netcdn.co/app/431946152/how-to-hack-someone-in-roblox-2021-game-hack, likely serves as a download source for a secondary payload. The document's content and structure strongly suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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-someone-in-roblox-2021-game-hack PDF link annotation
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/free-robux-paste-data_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-robux-with-cmd_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/hacking-a-roblox-scammer_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/roblox-games-for-free-no-sign-up_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/minecraft-free-install_GM479516143.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/buy-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/roblox-counter-blox-script-hack_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/code-cheat-roblox-to-tchat_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/boku-no-roblox-remastered-hacks_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/what-is-the-cheat-t-get-robux_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/free-robux-accounts_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/roblox-dragon-ball-z-final-stand-hack_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/fe-hack-roblox_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__stIn macro / runtime command snippet
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004cce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CCE 35520 bytes
SHA-256: e8c93217951fc21ded8d5b7fe44968b11c37692127acce208b2bbaec7490dc8f
font_01_sfnt_off00009afb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AFB 19008 bytes
SHA-256: f1c07f3f01d6c761ba5950570e7bbeffc73e10eecfc8d869194499917c3e83f4

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