Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5a666d66df5bf59…

MALICIOUS

PDF

43.1 KB Created: 2021-05-16 12:22:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 67ad8feb68d5417b60d43b358d6131a2 SHA-1: 6d0ea134f9204966162fa8869539d843e8cb1b7a SHA-256: b5a666d66df5bf59b9fba75566821a0dfc39d350ec5c4a6fc37d0c5117293047
82 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment T1059.003 Windows Command Shell

The PDF document contains a lure for downloading a file, indicated by the 'SE_DOWNLOAD_BUTTON' heuristic and the embedded URL. Furthermore, the 'SE_CLIPBOARD_COMMAND_LURE' heuristic suggests the document instructs the user to execute commands, likely to run the downloaded payload. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to trick users into downloading and executing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/479516143/wurst-1.15-2-game-hack PDF link annotation
    • http://finettifrs.it/images/free-robux-come_GM431946152.pdfIn PDF document text
    • http://finettifrs.it/images/robux-no-verification_GM431946152.pdfIn PDF document text
    • http://finettifrs.it/images/feb-23-2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://finettifrs.it/images/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • http://finettifrs.it/images/can-lucky-patcher-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://finettifrs.it/images/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://finettifrs.it/images/coin-master-village-3_GM406889139.pdfIn PDF document text
    • http://finettifrs.it/images/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://finettifrs.it/images/coin-master-daily-free-link_GM406889139.pdfIn PDF document text
    • http://finettifrs.it/images/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • http://finettifrs.it/images/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://finettifrs.it/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://finettifrs.it/images/cheats-coin-master-free-spins-and-news_GM406889139.pdfIn PDF document text
    • http://finettifrs.it/images/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://finettifrs.it/images/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://finettifrs.it/images/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://finettifrs.it/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://finettifrs.it/images/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://finettifrs.it/images/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://finettifrs.it/images/avatar-the-last-airbender-roblox_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_off00004d0c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D0C 25372 bytes
SHA-256: 2c050b0404252e6fdb421a4b913fefb5d3342912d393b41faebed977e66bcb2a
font_01_sfnt_off00008736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8736 17988 bytes
SHA-256: 94ec895cad4eeca7e3e8945795636ab9bfa2b0222484f596d6ff7da1964e26b2

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