Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e053bbab69c3386…

MALICIOUS

PDF

34.7 KB Created: 2021-06-30 11:27:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e4744e923d3cd0f5e0e36eb18670640f SHA-1: a55356d4cab90aac5c3e34cf5671810fb3fc2cfa SHA-256: 1e053bbab69c338622e5b07d2511df35ef66efb66e1a352882f83f4110fb2e02
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.003 Windows Command Shell

This PDF document is identified as malicious by an ML classifier and contains heuristics indicating it lures users with promises of free Robux or game hacks. It explicitly instructs the user to copy and paste content into a command-line execution context, likely to download and execute a second-stage payload from the embedded URL. The document body and extracted URLs reinforce the theme of game exploits and cheating.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/free-robux-google-chrome-extension-game-hack PDF link annotation
    • http://upes.edu.sv/ckfinder/userfiles/files/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/how-to-hack-roblox-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/esp-hack-roblox-script_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/how-to-get-free-robux-for-real-not-fake-2021_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/free-account-roblox-2021_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/funcionando-nuevo-hack-roblox-jailbreak-phantom-forces-booga-booga_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/hack-roblox-with-cmd_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/roblox-aimbot-hack-2021-august_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/free-minecraft-gift-card_GM479516143.pdfIn macro / runtime command snippet
    • http://upes.edu.sv/ckfinder/userfiles/files/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/avatar-roblox-game_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/roblox-cheats-november-2021-dll_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/free-tiktok-likes-without-verification_GM835599320.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/free-roblox-stuff-2021-promo-codes_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/roblox-executor-free_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/fiIn 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
font_00_sfnt_off00003141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3141 21948 bytes
SHA-256: 25e21c281330dd5366859e98489bdcadb726e93ccd0ad147827a3492bfa86035
font_01_sfnt_off000061bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BD 19440 bytes
SHA-256: 119938d18da6baa76e225368bed0810bb4627a4aba089e4cbd131d2120280b93

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