Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0738428f1a61233…

MALICIOUS

PDF

42.3 KB Created: 2021-05-16 07:37:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d7e09dda9867ec3d6b0bde1b03e480ca SHA-1: 7575046bb0d17d85d63d6032b13758766ec45293 SHA-256: b0738428f1a61233f2ccacecc63d6e31e5a090e4e174a66204b2b49176c25e7b
82 Risk Score

Malware Insights

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

The sample displays a fake CAPTCHA, a common lure to trick users into interacting with malicious content. The embedded URI points to a URL that likely serves as a download or redirect to a second-stage payload. 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/431946152/is-there-any-way-to-get-free-robux-game-hack PDF link annotation
    • http://sbm-nn.ru/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spin-link-twitter_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hacking-news_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-32-hack-apk_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-cheat-codes-free_GM406889139.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_off0000479c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x479C 25116 bytes
SHA-256: 27710c3c7b6f427a1fb520d93c65a193e365fbc5906ed1a17d9678ba7e4eada9
font_01_sfnt_off00008108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8108 18892 bytes
SHA-256: d4b621edf5ac5f073c5a65dd804db4f1f2ad13c123c1b5ace541ce5f5c284f58

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