Malicious PDF — malware analysis report

Static analysis result for SHA-256 eccd4c355d3b6c4c…

MALICIOUS

PDF

47.5 KB Created: 2021-06-11 06:42:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: beb24ff917a5a8368aba1e0bbe5334a4 SHA-1: a76049de775707850177bceed828e1e9babee784 SHA-256: eccd4c355d3b6c4c86d5e63cf8f68f31fcd30e4c7ee6806c1f075ce621354fe1
82 Risk Score

Malware Insights

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

The document displays a fake CAPTCHA lure, which is a common tactic to trick users into interacting with malicious content. It contains an external URI pointing to a URL that likely hosts a second-stage payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/roblox-build-to-survive-the-zombies-cheats-game-hack
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/coin-master-free-spins-link-today-new_GM406889139.pdf
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/free-coin-master-spins-and-coins_GM406889139.pdf
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/coin-master-spin-link-today-2021_GM406889139.pdf
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/roblox-hack-apk_GM431946152.pdf
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/free-roblox-account-generator_GM431946152.pdf
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/robux-money_GM431946152.pdf
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/free-ways-to-get-robux_GM431946152.pdf
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/how-to-get-free-spins-in-coin-master_GM406889139.pdf
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/coin-master-hack-version-download-2021_GM406889139.pdf
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/robux-free-robux_GM431946152.pdf
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/how-to-hack-roblox-accounts-passwords_GM431946152.pdf
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/free-coins-coin-master-link-today_GM406889139.pdf
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/robux-free-roblox-hack_GM431946152.pdf
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/1x1x1x1-roblox-id_GM431946152.pdf
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/how-to-get-free-robux-games_GM431946152.pdf
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/como-generar-coin-master-free-spins_GM406889139.pdf
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/roblox-hacks-2021_GM431946152.pdf
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/minecraft-build-hacks_GM479516143.pdf
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/daily-free-spin-coin-master-link_GM406889139.pdf
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/free-robux-apk_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000548b.bin
c18778eaffca1f85cf3d493f0e8581139f76c1da686c6306b88af9fae0d5e815		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x548B 27648 bytes
font_01_sfnt_off000094a1.bin
918f857628affb3b16d3cab8357060028a48f900faf915adbf6932452375e4a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94A1 19184 bytes

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