Malicious PDF — malware analysis report

Static analysis result for SHA-256 12dae3b9b8124646…

MALICIOUS

PDF

42.8 KB Created: 2021-05-16 23:44:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c242c217969b2ee7cc0c91dc20a60a60 SHA-1: 7898cc83bfcc27fdbc861c22cbbdda81d504fe4f SHA-256: 12dae3b9b81246463cdd803aa81020b368ecba4208f3179147ca75d350f47705
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to trick the user into clicking a malicious link. This link, 'https://netcdn.xyz/app/406889139/free-coin-master-spins-daily-game-hack', likely leads to the download of a secondary malicious payload. The presence of multiple embedded URLs and the ML classifier's high confidence score support this assessment.

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/406889139/free-coin-master-spins-daily-game-hack
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/coin-master-free-gifts_GM406889139.pdf
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/100-free-coin-master-spins_GM406889139.pdf
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/is-roblox-free-on-nintendo-switch_GM431946152.pdf
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/create-minecraft-server-free_GM479516143.pdf
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/coin-master-email-free-spins_GM406889139.pdf
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdf
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/free-bedrock-minecraft_GM479516143.pdf
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/minecraft-noob-vs-pro-vs-hacker_GM479516143.pdf
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/spin-free-coin-master_GM406889139.pdf
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/free-minecraft-account-and-password-2021_GM479516143.pdf
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/coin-master-free-spins-link-june-2021_GM406889139.pdf
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/how-to-hack-coin-master-game-2021_GM406889139.pdf
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdf
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/roblox-generator-no-human-verification_GM431946152.pdf
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/coin-master-free-spins-link_GM406889139.pdf
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/coin-master-hack-2021-android-apk_GM406889139.pdf
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/free-minecraft-accounts-reddit_GM479516143.pdf
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/minecraft-build-hacks_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b1c.bin
7617366d8dc25d23cc2c1779f8dbc772249b3ed245abf07f360cfd22114dc089		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B1C 25628 bytes
font_01_sfnt_off000084fd.bin
55b350ba652cc81c58cde26cd3be3a49d0b7ceb69ba015e6646fbbf561effc1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84FD 18308 bytes

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