Malicious PDF — malware analysis report

Static analysis result for SHA-256 51c0a96e384eddb4…

MALICIOUS

PDF

35.2 KB Created: 2021-06-30 01:22:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8c742410e48aa78bf05ee1744d2b1ab0 SHA-1: 73798307eecf8ffa06e508908d57acef52d1f08e SHA-256: 51c0a96e384eddb472ab6239da3acd8bb73e89da2abbfe3213cb9aecad3a81cf
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for "free Robux" and "game hacks", directing users to a suspicious URL. This indicates a social engineering tactic to trick users into downloading potentially malicious content. The ML classifier also flagged the PDF as malicious, increasing confidence in this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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/free-robux-redeem-codes-2021-game-hack PDF link annotation
    • http://digilib-ppsunisma.ac.id/repository/how-to-make-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/20-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-earn-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-script-hack-pizza-factory_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/dominus-roblox-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-unlimited-coin-master-online-tool_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-robux-generator-v131-wwwwehackcom_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/toolbox-for-mcpe_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-redeem-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-fr-extreme-hack_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-roebucks-com_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-no-clip-hack_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-free-hack-client_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/rover-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/pubg-8-uc_GM1330123889.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-gravity-hack_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/play-minecraft-online-free_GM479516143.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_002_off00002ea4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EA4 23224 bytes
SHA-256: 15ce02e9a034c1c99ee6569a03b7cfd873f4986773b79ccb24d6da096f160708
font_01_sfnt_off000062f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F8 19552 bytes
SHA-256: 9e1dac473263c0de9d7d37a0c1ac97fc6faf5ff8611277a673aaa799431b51c3

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