Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7207523861fce8f…

MALICIOUS

PDF

13.6 KB Created: 2021-07-04 01:58:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e5112c7fa865dac57e6f6f84a3a2930e SHA-1: b136849f858776181ceedeedca5e28b4c49ed324 SHA-256: b7207523861fce8fa666fdf590b3815558a6f377b407347b69ad1b76faac37f8
152 Risk Score

Malware Insights

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

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/406889139/free-coin-master-spins-link-game-hack. This link is presented as a lure for free game items, indicating a phishing or scam attempt. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9861

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/406889139/free-coin-master-spins-link-game-hack In PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/spin-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-install-free_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-roblox-item-codes-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/hack-the-coin-master-game_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-spins-october-28-2021-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-verification_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/hackear-coin-master-sin-root_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-facebook-page_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-spins-coin-master-2021-glitch_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-item-november-2021-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-no-bot-check_GM431946152.pdfIn PDF document text

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