Malicious PDF — malware analysis report

Static analysis result for SHA-256 a407d870450a4a43…

MALICIOUS

PDF

16.1 KB Created: 2021-07-09 05:06:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: fbbcbb68236c4f3662e711c3aea0fc65 SHA-1: 3f2fdfaba363776f5ad1286ca9884aaf5283584a SHA-256: a407d870450a4a43cb7dd6c7107995c95f0b9e8f47f76769f0936357c17af2a8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external URLs, including a known malicious redirector at http://netcdn.tw/app/431946152/how-to-get-free-robux-2021-game-hack. The document body and heuristics indicate a lure related to free in-game currency or hacks, suggesting a phishing or scam attempt. No scripts were extracted, but the presence of malicious links is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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/how-to-get-free-robux-2021-game-hack In PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/how-to-get-free-items-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/best-free-vpn-for-roblox_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/robux-today_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-girl-hair-roblox_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/how-to-give-yourself-robux-by-hacking_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/how-to-get-robux-in-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/robux-free-co_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/roblox-ticket-cheat-engine_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text

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