Malicious PDF — malware analysis report

Static analysis result for SHA-256 716cb8a2161c6984…

MALICIOUS

PDF

24.7 KB Created: 2021-06-09 15:38:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 19c825aad21d8c1782f50062bf3775c5 SHA-1: 02fd6b021570cc1cb3ea85cca4a6e68d10775288 SHA-256: 716cb8a2161c69842093891edc8f0719836bbcf69b35fa57259666a13efe4fe2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free currency'. The primary malicious link identified is https://netcdn.tw/app/431946152/hack-robux-no-human-verification-no-download-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a redirection-based social engineering attack, likely intended to lead users to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 3

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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/hack-robux-no-human-verification-no-download-2021-game-hack In PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-game-free_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-do-you-get-free-robux-on-xbox-one_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-free-robux-using-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/200-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-stop-attack-hack_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/do-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-hack-accounts-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-girl-hair-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text

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