Malicious PDF — malware analysis report

Static analysis result for SHA-256 9437e87749fc0572…

MALICIOUS

PDF

50.2 KB Created: 2021-06-08 22:42:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 04ee812254d3ff87d20cdcdec3a38160 SHA-1: 7c804a22e7aaec35fb547f75dd2d9581282b8774 SHA-256: 9437e87749fc0572ab031c05389691625804199a8a12f7607ada8bddb6cb414a
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'Free Robux' and includes a prominent link to a URL that likely hosts a malicious payload. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to trick users into downloading further malware. No scripts were extracted, but the document structure and external links suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9841

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/free-robux-obby-roblox-game-game-hack
    • http://www.fkunismuh.org/perpustakaan/repository/minecraft-xbox-one-free_GM479516143.pdf
    • http://fkunismuh.org/perpustakaan//repository/how-to-change-username-on-roblox-for-free_GM431946152.pdf
    • http://fkunismuh.org/perpustakaan//repository/coin-master-free-spins-2021_GM406889139.pdf
    • http://fkunismuh.org/perpustakaan//repository/coin-master-apk-hack-32_GM406889139.pdf
    • http://fkunismuh.org/perpustakaan//repository/scaffold-minecraft-hack_GM479516143.pdf
    • http://fkunismuh.org/perpustakaan/repository/coin-master-gameplay_GM406889139.pdf
    • http://fkunismuh.org/perpustakaan/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • http://www.fkunismuh.org/perpustakaan/repository/free-roblox-groups-with-funds_GM431946152.pdf
    • http://www.fkunismuh.org/perpustakaan/repository/150-free-spins-coin-master_GM406889139.pdf
    • http://fkunismuh.org/perpustakaan//repository/how-to-earn-free-stars-on-coin-master_GM406889139.pdf
    • http://fkunismuh.org/perpustakaan/repository/how-to-become-a-hacker-in-roblox_GM431946152.pdf
    • http://fkunismuh.org/perpustakaan/repository/roblox-hack-tool-download-2021_GM431946152.pdf
    • http://www.fkunismuh.org/perpustakaan/repository/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdf
    • http://fkunismuh.org/perpustakaan/repository/android-coin-master-hack-2021_GM406889139.pdf
    • http://fkunismuh.org/perpustakaan/repository/how-to-setup-a-minecraft-server-for-free_GM479516143.pdf
    • http://fkunismuh.org/perpustakaan/repository/coin-master-free-spins-hack-without-human-verification_GM406889139.pdf
    • http://www.fkunismuh.org/perpustakaan/repository/robux-no-verification_GM431946152.pdf
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdf
    • http://fkunismuh.org/perpustakaan/repository/free-robux-generator-without-verification_GM431946152.pdf
    • http://fkunismuh.org/perpustakaan//repository/roblox-lawsuit_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005562.bin
aa2509ba16e47da47158c6fa41a78ef78aed10524707c34b92dc7ff14e27e506		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5562 26616 bytes
font_01_sfnt_off00009353.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9353 5696 bytes
font_02_sfnt_off0000a065.bin
6d0f99a24346e6a367d804a6a86eca8174392bfaee57bef3aba919d75189266d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA065 18756 bytes

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