Malicious PDF — malware analysis report

Static analysis result for SHA-256 578dc6f85b03a6e4…

MALICIOUS

PDF

35.2 KB Created: 2021-06-27 08:23:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6fe1fcf003b4b8abc2efe1317921bf66 SHA-1: da06ce1d65014d96ec627c331bef8f813dc03498 SHA-256: 578dc6f85b03a6e46c3fc5c206ef47194afdb98a980c00ae4daff0684143f8fa
82 Risk Score

Malware Insights

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

The document contains numerous embedded URLs and text referencing game cheats and in-game currency, strongly suggesting a lure to a malicious download site. The ML classifier also flagged this PDF as malicious with high confidence. The presence of 'cmds-injection-jailbreakdll' in a URL further indicates a potential command injection or exploit attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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/jailbreak-roblox-cheats-cage-game-hack PDF link annotation
    • https://digilib.akperkabpurworejo.ac.id/repository/free-player-points-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/roblox-id-code-for-cheats-for-hoes_GM431946152.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/new-roblox-hack-30-cmds-injection-jailbreakdll-2021_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-group-payouts-roblox_GM431946152.pdfIn macro / runtime command snippet
    • http://digilib.akperkabpurworejo.ac.id//repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/how-to-get-more-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/minecraft-java-account-free_GM479516143.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-robux-javascript-2021_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/how-to-get-free-gamepasses-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/robux-hacks-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/lion-studio-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/get-robux-today_GM431946152.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/new-free-items-on-roblox-promocode_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/roblox-hack-enginesaa_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/wurst-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/coin-master-ios-hack-download_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_off000030e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E5 22956 bytes
SHA-256: acd43d8f45d60e38d77fdf54d5dc4e74d0b343842d2f444a6b0996c529fbcd2f
font_01_sfnt_off0000644e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x644E 19212 bytes
SHA-256: deab28486800178591b6bfa789fd3be9731c9cf5adea8ecee027e637ca0a077f

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