Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e79ab03b8d0565f…

MALICIOUS

PDF

56.2 KB Created: 2021-06-07 07:59:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3d9b86df639e5a1a40bdaed78750152f SHA-1: d1f13ef56059afffa00c7008ad000873dbcb3318 SHA-256: 4e79ab03b8d0565f8748b9a7ef6d50cb5763406f644336644debbc1ae14c6e32
82 Risk Score

Malware Insights

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

The document lures the user with game-related content and displays a fake CAPTCHA to encourage interaction. It contains multiple embedded URLs, including one pointing to a site offering a 'game hack'. The ML classifier also flagged this PDF as malicious, indicating a high likelihood of malicious intent. The primary goal appears to be directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9360

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/how-to-be-thanos-in-roblox-for-free-game-hack
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdf
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/minecraft-hacked-client_GM479516143.pdf
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/minecraft-svg-free_GM479516143.pdf
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/minecraft-114-download_GM479516143.pdf
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/free-minecraft-codes-2021_GM479516143.pdf
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/coin-master-heaven-links_GM406889139.pdf
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins_GM406889139.pdf
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/free-robux-gen_GM431946152.pdf
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/pubg-uc-price-in-nepal_GM1330123889.pdf
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/minecraft-dungeons-free-download_GM479516143.pdf
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/free-100-robux_GM431946152.pdf
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/cool-minecraft-hacks_GM479516143.pdf
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/getrobux-come_GM431946152.pdf
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/play-roblox-free-online_GM431946152.pdf
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/113-hacked-client_GM479516143.pdf
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/get-free-robux-generator_GM431946152.pdf
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/mine-minecraft-games-for-free_GM479516143.pdf
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/free-stuff-on-roblox_GM431946152.pdf
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/coin-master-free-spins-generator-no-human-verification_GM406889139.pdf
    • https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/minecraft-hacker-skin_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000559e.bin
971a4ffc70258fe421536e123da2264c87a15598b7a1be84379d63b33fdcf50f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x559E 32872 bytes
font_01_sfnt_off0000a00f.bin
d2fbe445e4228ea2e3d75d3e8f0f84124f9dd8d3d0cf2c6e4e63bcca92f2519f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA00F 3512 bytes
font_02_sfnt_off0000ab9e.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB9E 5696 bytes
font_03_sfnt_off0000b8b0.bin
58e849e45b7dad30bfbaf8775875fbf30583aa7d86d8be8b1fd82e460e98aea5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8B0 18508 bytes

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