Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5ffcedc944f6b06…

MALICIOUS

PDF

48.0 KB Created: 2021-06-02 12:50:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5847f4bd5f0b436492f702a2f36d5e78 SHA-1: cba07562b0adf7c9543053d8fe5357211401a2f8 SHA-256: f5ffcedc944f6b06ba961433a047642c34ac81f6dc2f97c31ed53d072341975e
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, which is a common social engineering tactic to trick users into interacting with malicious content. The embedded URL points to a suspicious domain, likely serving as a download source for a secondary payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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-hack-stage-samim-sinim-youtube-aid-game-hack
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/tiktok-free-like-and-followers_GM835599320.pdf
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/free-robux-kid-friendly_GM431946152.pdf
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/coin-master-free-spins-cheat_GM406889139.pdf
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/minecraft-for-macbook-free_GM479516143.pdf
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/play-roblox-for-free-on-google_GM431946152.pdf
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/do-robux-generators-work_GM431946152.pdf
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/free-minecraft-capes-no-mods_GM479516143.pdf
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/free-spins-coin-master-hack_GM406889139.pdf
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/cute-free-roblox-clothes_GM431946152.pdf
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdf
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/coin-master-free-coins-link-2021-deutsch_GM406889139.pdf
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/minecraft-hacks-xbox_GM479516143.pdf
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/is-it-possible-to-get-free-robux_GM431946152.pdf
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/june-29-coin-master-hack-no-human-verification_GM406889139.pdf
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/coin-master-free-2021-spin-link_GM406889139.pdf
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/free-robux-on-phone_GM431946152.pdf
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/coin-master-free-coin-hack_GM406889139.pdf
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/minecraft-mac-free_GM479516143.pdf
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/minecraft-story-mode-free_GM479516143.pdf
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/coin-master-freebies-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005740.bin
e668658eb9486997b5cabb613e40532df2979617d41f4405b6935ac8626a6602		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5740 26776 bytes
font_01_sfnt_off000095b2.bin
bb772385e8f884b2c3cf64138161b638498c6dcdf6d6fabf65f717574845b16f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95B2 19428 bytes

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