Malicious PDF — malware analysis report

Static analysis result for SHA-256 cac8604c9dff1f6a…

MALICIOUS

PDF

42.8 KB Created: 2021-05-14 20:02:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ecde7749a7b42bb90cd62a9db808c833 SHA-1: 668e9a471ec6ddf87024b621d1a709459ab20613 SHA-256: cac8604c9dff1f6a12b4fe3595bb1227e6ad4639fa12b98e2f470e61933a8787
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick the user into clicking a malicious link. The primary external URI points to a suspicious URL, likely serving a secondary payload. No scripts were extracted from this sample, but the presence of a fake CAPTCHA and external links strongly suggests a social engineering attack aimed at downloading further malware.

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/roblox-rape-game-hack
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-for-free_GM431946152.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/coin-master-hacks-for-gold-cards_GM406889139.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/blox-land-free-robux_GM431946152.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/wurst-115-2_GM479516143.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-hack_GM406889139.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/roblox-images_GM431946152.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/coin-master-facebook_GM406889139.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-blogspot_GM406889139.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-hack_GM431946152.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/easy-way-to-get-robux_GM431946152.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/roblox-hack-app_GM431946152.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/free-robux-games-that-actually-work_GM431946152.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/how-to-hack-someones-roblox-account_GM431946152.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/hack-coin-master-ios_GM406889139.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/www-free-robux_GM431946152.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/free-limiteds-roblox_GM431946152.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-in-minecraft_GM479516143.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/free-robux-com_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004bf0.bin
c0c7271910d0c0398c857c1a8e26d7ab88264f54e188de151334454ee62f73e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BF0 24812 bytes
font_01_sfnt_off00008515.bin
7b0e62004be5de0be056fd536bcc8e8a672533f3da2194ce9dcdd2528ec644b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8515 18188 bytes

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