Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5be6e05ad946500…

MALICIOUS

PDF

51.0 KB Created: 2021-06-14 01:37:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 885b7fc2d9a2742070bd94d7af07ae18 SHA-1: bbd56656f403c1488488bcbb5f5ac7c09e071dfb SHA-256: f5be6e05ad9465003f4e80511809198dc9f54fd293f5c07558741d8acd39c10f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document uses a lure related to obtaining free Robux, a popular in-game currency, to entice users. It contains embedded URLs pointing to potentially malicious content, and the ML classifier flagged it with high confidence. The presence of a 'password-protected archive' lure suggests the document is designed to trick users into downloading an encrypted payload, likely to bypass security checks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9348

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/how-to-get-free-robux-easy-add-game-hack
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/free-robux-reddit_GM431946152.pdf
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/how-to-use-scripts-in-roblox-hack_GM431946152.pdf
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/roblox-flying-hacks-porjects-rasp_GM431946152.pdf
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/www-free-robux-com_GM431946152.pdf
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/how-to-hack-roblox-yammy_GM431946152.pdf
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/free-tiktok-followers-no-human-verification-or-survey-2021_GM835599320.pdf
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/minecraft-free-version_GM479516143.pdf
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/free-roblox-scripts_GM431946152.pdf
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/free-spins-and-coins-coin-master-2021_GM406889139.pdf
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/free-minecraft-skin-creator_GM479516143.pdf
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/robux-offer-wall_GM431946152.pdf
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/coin-master-cheats-2021_GM406889139.pdf
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/free-unlimited-robux-hack-no-human-verification_GM431946152.pdf
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/how-do-i-get-free-spins-in-coin-master_GM406889139.pdf
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/roblox-god-hack-download_GM431946152.pdf
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/free-minecraft-java-edition_GM479516143.pdf
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/free-tiktok-accounts-and-passwords_GM835599320.pdf
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/best-free-minecraft-skins_GM479516143.pdf
    • http://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/mega-cheat-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ff3.bin
54f199a1dbc63d014223bb785a9bf49b99c33e3725fb93a3bc2247f4e44db194		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FF3 31424 bytes
font_01_sfnt_off00009614.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9614 5696 bytes
font_02_sfnt_off0000a326.bin
319591314d6324676ebf02f1c153b068a881565ab30f55d70414dc83b3c91e07		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA326 18864 bytes

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