Malicious PDF — malware analysis report

Static analysis result for SHA-256 92f631aee54c7196…

MALICIOUS

PDF

44.6 KB Created: 2021-05-10 23:02:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ba97795cdb55ed719495a6532f9577f9 SHA-1: 098cf31de4a558348ae5c7579c1b74e236b899ee SHA-256: 92f631aee54c7196abf5ed4d1cac83c826924b42435b36ed5c2aabaeac0b71c8
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 users into clicking malicious links. The primary external URI points to a URL associated with game cheats, suggesting a social engineering attack. While no scripts were directly extracted, the presence of embedded URLs and the fake CAPTCHA heuristic strongly indicate a malicious intent to lead the user to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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-hax-game-hack PDF link annotation
    • https://perpustakaan.stifar.ac.id/repository/robuxhub-net_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-and-spin-link_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4770 24580 bytes
SHA-256: 733c9ac0c17cee120d3b1582ae580986e14ec8d78b4cf6ef09ec1d0fff5df8ce
font_01_sfnt_off00007f82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F82 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00008c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C93 18012 bytes
SHA-256: fe32b9a84fd76e39179a36863ed7420befb5e97ed4cdc4cc8cf112027e4fb10b

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