Malicious PDF — malware analysis report

Static analysis result for SHA-256 167c380c4026826c…

MALICIOUS

PDF

48.7 KB Created: 2021-05-11 05:03:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 04c67ee24a37fcceb100ec2ae23e47d8 SHA-1: c352a5057cc10eaae1c5660b45f8786cddef2e36 SHA-256: 167c380c4026826ca9ea28946d8d3509a631ebdb06bd48a6e0971f40bbc15d56
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a malicious lure, employing a fake CAPTCHA to trick users into interacting with embedded links. The document contains a large number of external links, many of which point to pages offering hacks or cheats for games like Coin Master and Minecraft, suggesting a scam or malware distribution vector. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8642

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/hack-de-coin-master-game-hack
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-apk-no-survey_GM406889139.pdf
    • http://pustaka.bbppketindan.info/repository/free-coinmaster-spins_GM406889139.pdf
    • http://pustaka.bbppketindan.info//repository/coin-master-free-coins-facebook_GM406889139.pdf
    • http://pustaka.bbppketindan.info/repository/coin-master-free-spins-hack_GM406889139.pdf
    • http://pustaka.bbppketindan.info/repository/minecraft-wurst-hacked-client_GM479516143.pdf
    • http://pustaka.bbppketindan.info/repository/coin-master-free-gold-cards-link_GM406889139.pdf
    • http://pustaka.bbppketindan.info//repository/fb-coin-master-free-spins-link_GM406889139.pdf
    • http://pustaka.bbppketindan.info/repository/spin-and-coin-link_GM406889139.pdf
    • http://pustaka.bbppketindan.info//repository/free-minecraft-account-reddit_GM479516143.pdf
    • http://pustaka.bbppketindan.info//repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdf
    • http://pustaka.bbppketindan.info/repository/codes-to-get-free-robux_GM431946152.pdf
    • http://pustaka.bbppketindan.info/repository/free-robux-for-kids_GM431946152.pdf
    • http://pustaka.bbppketindan.info//repository/haktuts-coin-master-free-spin-link_GM406889139.pdf
    • http://pustaka.bbppketindan.info//repository/how-do-you-get-free-roblox_GM431946152.pdf
    • http://pustaka.bbppketindan.info/repository/www-coinmaster_GM406889139.pdf
    • http://pustaka.bbppketindan.info//repository/free-coin-spin-daily-link-net_GM406889139.pdf
    • http://pustaka.bbppketindan.info//repository/coin-master-daily-spins_GM406889139.pdf
    • http://pustaka.bbppketindan.info//repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • http://pustaka.bbppketindan.info//repository/how-to-get-minecraft-pe-for-free_GM479516143.pdf
    • http://pustaka.bbppketindan.info/repository/coin-master-fan-page-free-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004cad.bin
9a5f28ce73608e74bc3fa59ed9ac4474c6ae92e91a43d935d47c2c722b26e55b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CAD 24636 bytes
font_01_sfnt_off00008535.bin
a17c2a746d49ac23b23e38a371e32fddecfcd91b10cf42ff6155bff6b8a07e91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8535 4028 bytes
font_02_sfnt_off000092d6.bin
6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92D6 2788 bytes
font_03_sfnt_off00009cc6.bin
fe1f543f7e0d5456aa533f199736749e60ab2e23c1ee6e9e48397ebfc3747ba6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CC6 17884 bytes

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