Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc4aecf3c21bae8…

MALICIOUS

PDF

43.9 KB Created: 2021-06-08 22:01:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d07d8ec9ff57f26551486e56d489c1a5 SHA-1: e7e23efa3572f0dd81bd0e06ea6c5998379405c8 SHA-256: afc4aecf3c21bae8d730f1d649929beca3dcd20a0c70fc2b08c907a2f05e1664
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to trick the user into clicking a link, which is a common social engineering tactic. The embedded URL, https://netcdn.tw/app/431946152/hack-para-volar-en-roblox-game-hack, likely leads to a malicious payload download. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/hack-para-volar-en-roblox-game-hack
    • http://halitbayramoglu.com.tr/images/coin-master-free-coins-2021_GM406889139.pdf
    • http://halitbayramoglu.com.tr/images/free-roblox-hack-script-executrer_GM431946152.pdf
    • http://halitbayramoglu.com.tr/images/roblox-script-inector-free_GM431946152.pdf
    • http://halitbayramoglu.com.tr/images/free-headless-head-roblox_GM431946152.pdf
    • http://halitbayramoglu.com.tr/images/free-robux-no-download-or-survey_GM431946152.pdf
    • http://halitbayramoglu.com.tr/images/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • http://halitbayramoglu.com.tr/images/rexima-roblox-cheat-for-apocalypse-rising_GM431946152.pdf
    • http://halitbayramoglu.com.tr/images/coinmaster-fan-page_GM406889139.pdf
    • http://halitbayramoglu.com.tr/images/coin-master-free-spins-daily-link-game-mod_GM406889139.pdf
    • http://halitbayramoglu.com.tr/images/free-roblox-accounts-with-robux_GM431946152.pdf
    • http://halitbayramoglu.com.tr/images/minecraft-packs-free_GM479516143.pdf
    • http://halitbayramoglu.com.tr/images/bullet-club-shirt-roblox-free_GM431946152.pdf
    • http://halitbayramoglu.com.tr/images/weird-roblox_GM431946152.pdf
    • http://halitbayramoglu.com.tr/images/how-to-get-free-roblox-money_GM431946152.pdf
    • http://halitbayramoglu.com.tr/images/coin-master-daily-free-spins-haktuts_GM406889139.pdf
    • http://halitbayramoglu.com.tr/images/roblox-free-items_GM431946152.pdf
    • http://halitbayramoglu.com.tr/images/how-to-get-free-robux-with-no-verification_GM431946152.pdf
    • http://halitbayramoglu.com.tr/images/www-coin-master-hack_GM406889139.pdf
    • http://halitbayramoglu.com.tr/images/roblox-hack-client_GM431946152.pdf
    • http://halitbayramoglu.com.tr/images/microsoft-bing-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004df8.bin
39ef359491721793612b09c7ae61c825903d2a1210629d12dfe24eedc09e5cd6		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DF8 25136 bytes
font_01_sfnt_off00008839.bin
4a2dc4914219e63075b099c09652e8d99cebf924b1e87ddba3aa9f93aaa501f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8839 18472 bytes

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