Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ec8abd4b7698e64…

MALICIOUS

PDF

44.7 KB Created: 2021-05-10 21:05:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 50ff73b7cc8b0f8a1f7a66dfd87cca39 SHA-1: e93ee77707a37c1e559116ef1055d0cda823eb83 SHA-256: 2ec8abd4b7698e64bc68b93dc3193ab275ab5581dbc5255783fb4c0dffa4e8f3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a fake CAPTCHA lure, designed to trick users into downloading a secondary payload. The embedded URI points to a suspicious URL, likely hosting the next stage of the attack. While no scripts were explicitly extracted, the PDF structure and heuristics suggest an attempt to initiate a download, aligning with a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/dailyrobux-game-hack
    • http://perpustakaan.man2kotaserang.sch.id//repository/rbx-earn_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/roblox-got-talent-piano-hack_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/minecraft-pe-free-download-ios_GM479516143.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/roblox-free-robux-generator_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/minecraft-hacks-115-2_GM479516143.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/minecraft-logo-maker-free_GM479516143.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/village-3-coin-master_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/hack-coin-master-32-mod-apk_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/how-to-hack-and-get-free-robux_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/robux-robux_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/roblox-free-online-game_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/minecraft-launcher-free_GM479516143.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/get-free-robux_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/coin-master-free-spins-link-today-new_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/windows-10-minecraft-free-with-java_GM479516143.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/roblox-booga-booga-hack_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/coin-master-free-coins-and-spins_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/aimbot-download-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ae9.bin
6221ea7789eca149bfdd84dc322f3286ded759b9bcafd40f7c807c0b4fa6df26		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AE9 28016 bytes
font_01_sfnt_off00008b50.bin
006376ad9c7b73d4fd15d3b6dd3ffa9064f0af8ff6d6cdc29d45d1e9c8c3f0f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B50 18620 bytes

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