Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3892f3eca7b354e…

MALICIOUS

PDF

12.2 KB Created: 2021-07-05 04:51:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: db4ee028f5a50036aa9f28a4322fbbb4 SHA-1: 3f62709b6f722ecccdab9436fdcdcaecb5eb88dc SHA-256: b3892f3eca7b354ec3a6024654b42e4af06f807c0a06811195d8ac7235e98c24
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary URL identified is http://netcdn.tw/app/431946152/free-robux-2021-no-human-verification-game-hack. While no scripts were explicitly extracted, the nature of the PDF and its embedded links suggest an attempt to trick users into visiting potentially harmful sites, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9842

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 http://netcdn.tw/app/431946152/free-robux-2021-no-human-verification-game-hack In PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/brick-bronze-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/tiktok-free-google-home-mini_GM835599320.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/giftrobux-com-generator_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/www-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-connection-lost_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-cheat-engine-shut-down_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/facebook-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/hack-for-rpg-world-on-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/worst-client_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-mod-apk-hack_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/robux-hack-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-hack-forums_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-spins-coin-master-links-app_GM406889139.pdfIn PDF document text

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