Malicious PDF — malware analysis report

Static analysis result for SHA-256 50bf257e293840b6…

MALICIOUS

PDF

42.9 KB Created: 2021-05-12 22:31:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 689ab4aeda1a4afdaf12277bef7935fc SHA-1: 226a8a4c50b93d4b12bb7e4798d4db8338346025 SHA-256: 50bf257e293840b629804cab6422fc8661de44817ecb41bcee35b09df6412027
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document displays a fake CAPTCHA or human verification prompt, a common social engineering tactic to trick users into interacting with malicious content. It also contains embedded URLs that lead to pages offering hacks or free items, further supporting a phishing or scamming attempt. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/free-spins-on-coin-masters-game-hack
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/coin-master-hack-online_GM406889139.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/microsoft-robux_GM431946152.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/a-lot-of-robux_GM431946152.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/free-coins-coin-master-hack_GM406889139.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/free-minecraft-thumbnails_GM479516143.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/freespinandcoin-blogspot-coin-master_GM406889139.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/300-free-spins-coin-master_GM406889139.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/robux-gainer_GM431946152.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/coin-master-rewards-2021_GM406889139.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/coin-master-hack-programers_GM406889139.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/easy-ways-to-get-free-robux_GM431946152.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/free-robux-no-verification-needed_GM431946152.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/static-moonactive-net-rewards-2021_GM406889139.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/free-roblox-intros_GM431946152.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/ac-market-coin-master-hack_GM406889139.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/coin-master-hack_GM406889139.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/coinmasterfreespinlink_GM406889139.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/minecraft-hack-mod_GM479516143.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/how-can-i-get-minecraft-for-free_GM479516143.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/roblox-bloxburg-free-money_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000487f.bin
aceaacb7c1c9a07fbc3c7a01c7369094a11b0d83220a1491745497ec14950229		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x487F 26784 bytes
font_01_sfnt_off00008691.bin
addbd5428a422ca7211e94293fed3a4f98c85d5f6337328d4d3623e90d90c649		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8691 17884 bytes

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