Malicious PDF — malware analysis report

Static analysis result for SHA-256 d91eba8d86be94cf…

MALICIOUS

PDF

35.5 KB Created: 2021-06-25 12:07:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 82c673da888e6490b3ff5243192e67ec SHA-1: 8a00a6a9dd206de1fed796e44dc7b85d04247bcf SHA-256: d91eba8d86be94cf5a6622ddfb836fb7e1532b005eef7322e8f4ed5d1a7ad31d
82 Risk Score

Malware Insights

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

The PDF document contains multiple links and a call-to-action lure related to game hacks and cheats, indicating a social engineering attempt to trick users into visiting malicious sites. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests it's designed to redirect users to potentially harmful content, likely for malware distribution or phishing. No scripts were extracted, but the overall pattern points to a downloader or redirector.

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.co/app/431946152/roblox-admin-hack-free-download-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/minecraft-sign-up-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-official-page_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/robuxglobalcom_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-printable-roblox-party-invitations_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-wallpapers-for-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
font_00_sfnt_off00003275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3275 22436 bytes
SHA-256: 58d23ae2fddea3006d138908da588ca8c01c271b403a767605d92ffa58371031
font_01_sfnt_off000063e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E9 19708 bytes
SHA-256: a4d9588d0b6e9cf14503f089d352e949d7c6363ba617b782a86763bf4d08eef8

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