Malicious PDF — malware analysis report

Static analysis result for SHA-256 0486b0ea35f5a8d4…

MALICIOUS

PDF

46.8 KB Created: 2021-06-07 15:28:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c9e3b16fc7333bdecbb042d30374d19b SHA-1: 263ad094df9a519cfc3db22f3f1c4b0d7419e484 SHA-256: 0486b0ea35f5a8d4d8fdbbe19c499abbca83651a160c1a9002657870e8429ba3
82 Risk Score

Malware Insights

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

The document displays a fake CAPTCHA to lure the user into downloading a malicious file, as indicated by the SE_FAKE_CAPTCHA heuristic. The embedded URL points to a resource that likely hosts a secondary payload. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/roblox-cheat-engine-lumber-tycoon-2-money-hack-game-hack
    • http://aks-akk.ac.id/html/perpusakk/repository/roblox-how-to-hack-other-peoples-accounts_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/free-modded-minecraft-server-hosting_GM479516143.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/pison-club-roblox-free-robux_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/roblox-free-robux-generator-no-survey-2021_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/roblox-to-play-games-for-free_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/free-robux-hack-tool_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/roblox-system32-host-hack_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/robux-hack-pc_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/free-roblox-face-accessories_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/roblox-hack-week-2021_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/isuku-roblox-free-shop-t-schirt_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/hacked-roblox-face-id_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/how-to-hack-a-roblox-account-2021-easy_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/nopde-engine-64-roblox-hacks_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/robux-generator-free-no-download_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/t-shirt-roblox-adidas-girl-free_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/client-hack-roblox-2021-download_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/free-ingame-money-in-any-roblox-game_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/how-to-get-tbc-on-roblox-for-free_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/ge5t-free-robux-doing-quizzies_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005383.bin
83fd372614b9a7e283330a3e678f687151a6a3a5c89dd4ae0427730664cf89dd		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5383 26408 bytes
font_01_sfnt_off0000900b.bin
1c6c07f5b78b14dc363edc2dc925fec5c1809314da9ba2a2ea3313b107d07501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x900B 19760 bytes

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