Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc7a24a625f395cf…

MALICIOUS

PDF

44.1 KB Created: 2021-06-07 15:12:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 909eba7f2fe21e06820eb8f8b3d89aa8 SHA-1: eaef4fa748deb0209ab0b0b07f8c52b1cbebf47c SHA-256: dc7a24a625f395cfcbae26d2d166596662462e4ce611cae9d20fb67aed9522f9
82 Risk Score

Malware Insights

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

The PDF document contains a lure for a "free Robux hack generator" and includes a high-risk external URI pointing to a suspicious download page. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it may exploit vulnerabilities or redirect users to malicious content, likely for initial access via spearphishing. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/free-robux-hack-generator-download-game-hack PDF link annotation
    • http://digilib.unla.ac.id/repository/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/pokemon-go-free-km_GM1094591345.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-admin-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coins-master-hacks_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack-apk-2021-ios_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/best-tricks-co-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/tiktok-free-ad-credit_GM835599320.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-roblox-wings_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/tiktok-free-books-website_GM835599320.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_off00004f61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F61 25200 bytes
SHA-256: 1f93d0a8473a3421f4d7233c3bab017a01afdae9134f6126394a60b928e4aff0
font_01_sfnt_off00008753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8753 19096 bytes
SHA-256: f7fa7b12fb925b2f1b4241e17465ddae52b6d51a850640d2c93c260d191a25d2

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