Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b5148516c812c55…

MALICIOUS

PDF

42.4 KB Created: 2021-05-12 10:33:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: bb9ed3aec221df32218f2cc183cc65b8 SHA-1: 0a0348ea189779e2ce38215fcf95cdc3862d7068 SHA-256: 0b5148516c812c55822ed42b05bdc362a8e3c0c39ec038b4efad44e1c0cec8ec
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document presents a fake CAPTCHA and a call-to-action to download 'free Robux', which is a common lure for users to click malicious links. The embedded URL points to a resource that likely serves as a downloader or redirects to further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.xyz/app/431946152/free-robux-com-2021-game-hack
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/coin-master-hacks-for-gold-cards_GM406889139.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/mcpe-master-hack-coins_GM406889139.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/coin-master-daily-free-spins-blogspot_GM406889139.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/free-robux-no-email_GM431946152.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/earn-free-robux-today_GM431946152.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/free-minecraft-packs_GM479516143.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/hacks-for-minecraft-bedrock_GM479516143.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/free-coin-master-spins-link_GM406889139.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/girl-roblox-avatar_GM431946152.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/free-robux-apk_GM431946152.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/how-to-download-wurst_GM479516143.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/prison-life-roblox-hacks_GM431946152.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/free-apk-mod-coin-master_GM406889139.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/free-robux-please_GM431946152.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/coin-master-free-spin-reward-links_GM406889139.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/roblox-arsenal-hack_GM431946152.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/minecraft-free-download-mobile_GM479516143.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/minecraft-hacked-client-18_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000499c.bin
46d5c3de3a0d77f2c1ca899c3f55e1f531ddd32e320e66397c92822746111509
pdf-font-stream PDF embedded font (sfnt) at offset 0x499C 25048 bytes
font_01_sfnt_off000081ff.bin
db7deb15448d884d15c6a42f746ab8a768d26593fd7e085f0109997e06cd96ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x81FF 18676 bytes