Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae6b22719bd15487…

MALICIOUS

PDF

42.3 KB Created: 2021-06-13 22:13:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9418d6eeec5d5fa67250e069acb735e1 SHA-1: c8e91057cf10023aeb150aad7cb7f1314913f8b1 SHA-256: ae6b22719bd15487ac63ffe5f4286d156bc0eb0bd12e88f9cc4e024344ea8ffc
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, a common social engineering tactic to trick users into interacting with malicious content. It also embeds multiple URLs, one of which is directly linked to a fake CAPTCHA and potentially a download. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood 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 http://netcdn.co/app/431946152/how-to-hack-unblock-roblox-password-game-hack PDF link annotation
    • http://fmbompastor.com.br/images/roblox-free-dollars_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-coin-master-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/roblox-free-catalog-hacks-thumbnail_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/roblox-code-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/get-800-free-robux_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • http://fmbompastor.com.br/images/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://fmbompastor.com.br/images/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/best-games-to-hack-on-roblox-non-fe_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/gamepass-roblox-free_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-robux-no-authentication_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_off0000487d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x487D 24980 bytes
SHA-256: ce155fafea6a9dcee53204ff85717fc4efdbba77bdf79a272952b3b71c38a32c
font_01_sfnt_off000080e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80E6 18860 bytes
SHA-256: fc1a029eec4114543a560ff46cbee117d41ace791608ffbe83e89ef4c472af98

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