Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b8e0ac6d8f3c5e0…

MALICIOUS

PDF

51.0 KB Created: 2021-06-04 05:04:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 96eefcd2d47536b3d30136923bbbfd6e SHA-1: 0d5fca9b3554a6c7d0b60aa94c0f441fce03dd6a SHA-256: 7b8e0ac6d8f3c5e0899e1ae3026aa782c0093c73ff2d0acde7c2ed77285ed8bd
82 Risk Score

Malware Insights

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

This PDF document employs a fake CAPTCHA lure to deceive users into interacting with it, likely leading to the download of a malicious payload. The document contains multiple embedded URLs pointing to external resources, including one at `https://netcdn.online/app/431946152/teach-me-to-hack-game-hack`, which is highly suspicious. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9724

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.online/app/431946152/teach-me-to-hack-game-hack
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-online-hack-generator_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-robux-site_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/robux-free-c_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-free-spins-link-today-haktuts_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-robux-master_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-coinmaster-spins_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/how-to-hack-to-get-robux_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/robux-free-2021_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/how-to-get-free-robux-fast_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/legit-free-spins-coin-master_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-robux-generator-no-verification-2021_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/how-to-make-free-robux_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/moon-active-games_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/get-free-spins-coin-master-october-2021_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-free-spins-16-04-19_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/minecraft-hacked-client_GM479516143.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-robux-real-2021_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-hacks-no-verification_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/hack-coin-master-game-apk_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004ed7.bin
ad5de0d36f81677d617cb84951daf3db084a14e80a78ac81259305ad9ee5a6e6		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ED7 31232 bytes
font_01_sfnt_off0000987b.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x987B 5696 bytes
font_02_sfnt_off0000a58d.bin
45a7ad0662f64c0d6803e23403df750b51a04dc480005b571e4443f6e5fef777		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA58D 18100 bytes

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