Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c8138c4b12eefe2…

MALICIOUS

PDF

41.6 KB Created: 2021-05-12 07:24:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2f18ded788620ed99c714623e3fcfc2d SHA-1: 513ca403829ad6eaaf2f95d56c4156e0ef4b3389 SHA-256: 7c8138c4b12eefe243f4ecaeaaa94047cf6b55e7c4213e0f5e88e8ca899648db
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure, aiming to trick users into interacting with malicious content. It embeds external URIs, including one pointing to 'netcdn.xyz', which likely serves as a landing page for a scam or malware distribution. The ML classifier also flagged this PDF as malicious with high confidence.

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/facebook-coin-master-free-spins-game-hack
    • http://sfsbm.org/images/card-hack-in-coin-master_GM406889139.pdf
    • http://sfsbm.org/images/best-free-minecraft-servers_GM479516143.pdf
    • http://sfsbm.org/images/free-spins-coin-master-without-survey_GM406889139.pdf
    • http://sfsbm.org/images/free-spins-coin-master-links-blogger_GM406889139.pdf
    • http://sfsbm.org/images/best-minecraft-hacked-client-2021_GM479516143.pdf
    • http://sfsbm.org/images/how-to-get-roblox-premium-for-free_GM431946152.pdf
    • http://sfsbm.org/images/how-to-hack-roblox-games_GM431946152.pdf
    • http://sfsbm.org/images/is-minecraft-free-on-nintendo-switch_GM479516143.pdf
    • http://sfsbm.org/images/new-free-spins-coin-master_GM406889139.pdf
    • http://sfsbm.org/images/robux-hack-no-verification_GM431946152.pdf
    • http://sfsbm.org/images/hack-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://sfsbm.org/images/coin-master-hack-tool-v1-9-download-free_GM406889139.pdf
    • http://sfsbm.org/images/how-to-get-to-village-3-in-coin-master_GM406889139.pdf
    • http://sfsbm.org/images/get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://sfsbm.org/images/daily-coin-master-free-spins_GM406889139.pdf
    • http://sfsbm.org/images/free-robux-master_GM431946152.pdf
    • http://sfsbm.org/images/www-roblox-com-free-robux_GM431946152.pdf
    • http://sfsbm.org/images/free-spins-on-coin-master_GM406889139.pdf
    • http://sfsbm.org/images/rbl-gg-free-robux_GM431946152.pdf
    • http://sfsbm.org/images/toolbox-for-minecraft-pe-ios_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000046cd.bin
e5462f452d50795e40327c6fb5e717fb0f89a9fc7ec110d0375a3042ab904037		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46CD 24976 bytes
font_01_sfnt_off00008065.bin
04111eee9c2a2756cf2b040d38ecbe9c25ace8b6aa6ca53a6765e3abdcc42c50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8065 18212 bytes

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