Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4d19f18feaa8216…

MALICIOUS

PDF

33.8 KB Created: 2021-07-03 23:37:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 866abf94cc78ab128c12c1856daade76 SHA-1: 663fbef392d15b87363074fdc9bcb03e721a6bf1 SHA-256: b4d19f18feaa821697197c8561f0cacfd80b66b703b2fb76240637661e7f583e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a website offering 'game hacks' and 'free generators', a common lure for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple related URLs reinforces this assessment. No scripts were extracted, but the primary attack pattern involves luring the user to a malicious external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.tw/app/431946152/how-to-hack-in-arsenal-game-hack PDF link annotation
    • http://digilib-pps.unja.ac.id/repository/rbxquest-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/cute-hacks-for-roblox-royal-hjigh_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/hack-de-roblox-robux-espaol_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/bird-simulator-roblox-coin-cheat_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-free-dowlod_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-skin-editor-free_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-jailbreak-speed-hack-codes_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-free-spins-2021-app-download_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-spins-in-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/mount-everest-roblox-free-rescue-gamepass-script_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-free-spins-link-download-today_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-hack-file-2021_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_off00002fe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE0 22068 bytes
SHA-256: b270847bb64fdc4ecfb4fc04576b36a482ee4b8a6c354e715c13215c3e265690
font_01_sfnt_off00006083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6083 18452 bytes
SHA-256: e830d4d2850352ff681c802b50bfdb69e36cdf0dd9a2fca6f972fc848603048f

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