Malicious PDF — malware analysis report

Static analysis result for SHA-256 8950ffa035aa6462…

MALICIOUS

PDF

41.1 KB Created: 2021-05-16 18:58:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4bf3e58f47856e0eb9444bd0dd0110f8 SHA-1: 55517cd04ff45c37f3203ec582f8c694c4954bd6 SHA-256: 8950ffa035aa6462ad6ce4be8271e1aa017db714a5c5f425e72aba484e02ec01
82 Risk Score

Malware Insights

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

The document displays a fake CAPTCHA to lure the user into clicking a malicious link, likely to download a second-stage payload. The embedded URL and numerous other URLs found in the document body point to sites offering game-related cheats and hacks, which are common lures for social engineering attacks. No scripts were extracted from this sample.

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/monttechs.com-coin-master-free-spins-game-hack PDF link annotation
    • http://sbm-nn.ru/images/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-facebook-page_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-mod-apk-latest-version-free-download_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-spins-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/2021-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000470d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x470D 24228 bytes
SHA-256: b6ce70b593a770c3bbee2798991c26260e5fbc8122cca13672cb9151968bf6b1
font_01_sfnt_off00007e18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E18 18380 bytes
SHA-256: efeb633a255f694e9143164e38fbc02a49932135eee8eb13370ba450910523e4

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