Malicious PDF — malware analysis report

Static analysis result for SHA-256 10669f85f2370b37…

MALICIOUS

PDF

15.0 KB Created: 2021-07-07 18:58:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: fe9b53e569b9210fdce1c5c0bcc8f886 SHA-1: aa98be4bfce724f1761d9962ae16850f3ea4fcc1 SHA-256: 10669f85f2370b37dd8335786657672a643d05b019030b67cd10676d2979ffee
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 at http://netcdn.tw/app/431946152/free-robux-discord-servers-game-hack. The document body and extracted URLs suggest a lure related to free game hacks and Robux, indicating a phishing or scam attempt. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence score support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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-discord-servers-game-hack In PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-roblox-svg_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-everything-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-hack-roblox-jailbreak-mac_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free4mobile24-com-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-draw-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/haxteamcf-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-400-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/master-free-spin-and-coin-links-html-m-1_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/wurst-112-2_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text

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