Malicious PDF — malware analysis report

Static analysis result for SHA-256 c94b5c10ff81f823…

MALICIOUS

PDF

34.3 KB Created: 2021-06-21 20:40:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 44849b9d4851cd7e0b968eef7d3de105 SHA-1: 6c93a2d769d5d202cf015bae4ab4b7af82b2c0d9 SHA-256: c94b5c10ff81f82375395905e7c2c19c2212d99e9d51ae105ca848b6fb39d7a1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains numerous embedded URLs and a clear lure for 'free Robux' and game hacks, indicating a phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests it's designed to redirect users to download further malicious content. No scripts were extracted, but the overall pattern points to a social engineering attack aiming to trick users into downloading unwanted software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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-me-game-hack PDF link annotation
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/coin-master-apk-hacked-3526_GM406889139.pdfIn PDF document text
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/robux-game_GM431946152.pdfIn PDF document text
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/150-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/free-spins-for-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/roblox-mining-simolator-hack-script_GM431946152.pdfIn PDF document text
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/getrobux-now_GM431946152.pdfIn PDF document text
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/coin-master-daily-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/coin-master-cheat-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/roblox-free-hair-codes_GM431946152.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_off00002f6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F6D 22472 bytes
SHA-256: 91eced20b49a77d9994b835fce198d75bcd41ef361d8998746e9a2fe4e1dc79c
font_01_sfnt_off00006185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6185 18912 bytes
SHA-256: f9b32ba6aa095a9de3495850bdf943af8b16f14d2b8a9638f1c0003dabb01306

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