Malicious PDF — malware analysis report

Static analysis result for SHA-256 425a2a044e4072f2…

MALICIOUS

PDF

46.7 KB Created: 2021-06-07 13:49:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 078d799898f8c9daf676ec8c15ff04b1 SHA-1: 77be8b229073c810d513e740e9d1ee9db13606f4 SHA-256: 425a2a044e4072f29216e8d35cbb34c47356c1e089bcd22bda79478defe6164c
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or verification prompt to trick users into downloading a file, likely related to 'Robux hacks'. The embedded URL and numerous similar URLs found in the document point to potential download locations for malicious payloads. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/robux-hack-2021-nooo-verification-or-survey-no-lie-game-hack PDF link annotation
    • http://library.forda-mof.org/katalog/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-link-app_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/se-puede-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-spins-on-coin-master-app_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-code-generator-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-maps-pe-free-download_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/pokemon-go-free-rare-candy_GM1094591345.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/instantrobux_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
font_00_sfnt_off000050d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50D2 28416 bytes
SHA-256: 855738ca018d1e767a34dcd04fdbe9c9a337e8176643ccdd26e8e3cfe26733b4
font_01_sfnt_off00009093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9093 19304 bytes
SHA-256: 9f403da232a9116f032b9e66c600a25c42589667968da42a03e3038f90992fe7

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