Malicious PDF — malware analysis report

Static analysis result for SHA-256 a38a8727bb68c1ea…

MALICIOUS

PDF

34.3 KB Created: 2021-06-18 06:03:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 966f3dd19cb613b699342fedc5937ced SHA-1: de3b443982750bd88c31d5fdfa86721ba2d70364 SHA-256: a38a8727bb68c1ea02caf1c90d488ef255c7fe36aceda5231073c2c7df36412c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document contains lures for free Roblox items and gift cards, directing users to download potentially malicious files. The presence of 'cmd_GM431946152.pdf' and associated URLs suggests an attempt to execute commands or download further payloads. While no scripts were explicitly extracted, the ML classifier and heuristic firings indicate malicious intent, likely involving exploitation for client execution after a phishing 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/redeem-gift-card-roblox-free-game-hack
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/free-roblox-place-downloads_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/get-free-robux-today-no-verification_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/secret-codes-to-get-free-robux_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/huskybuckscom-free-robux_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/roblox-i-ts-free_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/script-roblox-tycoon-cheat_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/free-roblox-jailbreak-money-hack_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/give-me-free-robux_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/fortmartin-roblox-hacks_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/how-to-get-free-robux-using-cmd_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/roblox-hack-tool-free-download-no-survey-no-password_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/roblox-hack-download-robux-2021_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/free-robux-codes-2021-on-ipad_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/free-items-roblox-codes_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/free-minifigure-codes-on-roblox_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/how-to-hack-peoples-roblox-accounts_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/free-roblox-avatar-gear_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/free-roblox-accounts-20212021_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/roblox-robux-hack-glitch_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/roblox-guest-shirt-free-2021_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fs
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000311d.bin
c2cfc0ecc1cec05cba6708f68e4d7d414347f9fa2b90c817b8cfb45b84f1f47c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x311D 21620 bytes
font_01_sfnt_off000060e5.bin
6655cf2169359dacfdd6f45f4335c9e7e737718d6aa0b5562439f995a21838cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E5 19120 bytes

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