Malicious PDF — malware analysis report

Static analysis result for SHA-256 cef6064cb82a42fa…

MALICIOUS

PDF

35.2 KB Created: 2021-06-27 12:43:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c43bdce15f74b6c48aaeb186899d7ca0 SHA-1: 7685d5361d556bfc3000aaea3f704d07071fd831 SHA-256: cef6064cb82a42fa0241b20997071e447440734b6d3e7d0c11415b08b0778785
82 Risk Score

Malware Insights

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

The document contains numerous links and text referencing free Robux and game hacks, aiming to trick users into downloading malicious files. The presence of external URIs and the ML classifier's high confidence score indicate a malicious intent to deliver a payload. The document body and heuristics suggest a social engineering lure for users interested in gaming cheats.

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/cmds-hacks-roblox-game-hack
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-robux-hack-2021_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-roblox-pikachu-accessories-2021_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/murder-mystery-free-online-games-roblox_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/get-tons-of-robux-free_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-hacks-inspect-roblox_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/ninja-animation-package-free-roblox_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/robux-hack-ohne-handy_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/minecraft-free-download-iphone_GM479516143.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/how-to-instal-wall-clip-roblox-hack-from-wearedevs_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-robux-from-gravel-pit_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/how-to-download-minecraft-for-free_GM479516143.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/how-to-hack-roblox-for-robux_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/infinite-jump-hack-roblox-2021_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/wwwroblox-hacks-for-robux-easy_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/how-to-hack-to-get-robux_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/minecraft-pe-hacks_GM479516143.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/v3rmillion-roblox-cheat-engine-table-lua-script_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-redeem-codes-that-last-all-the-time-roblox_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-tiktok-followers-app_GM835599320.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/roblox-fidget-spinner-free-games_GM431946152.pdf
    • http://netcdn.co/app/431946152/c
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003266.bin
9778e5f181a33644dcb2339abd86f504cfa26de2f0970604c77dc3685e4aea95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3266 22436 bytes
font_01_sfnt_off0000645a.bin
eac9452ad916f779f39da571708ea2e16dca7f311878e246517bcbac620adc0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x645A 19092 bytes

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