Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc91c8d669e59cc9…

MALICIOUS

PDF

5.3 KB Created: 2021-07-05 14:42:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 549c466e622401306972eb930e741b03 SHA-1: 373d14a417a73ab487bff0644c2d4ed579770cda SHA-256: cc91c8d669e59cc98d7c7ab77ba00db8d75acd499ee3ea3af015477d5eb7693e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/406889139/coin-master-mod-apk-hack-game-hack. The document body and heuristics indicate a lure for game hacks or generators, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the embedded URLs and redirector link are strong indicators of malicious intent, likely leading to further malware downloads or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8928

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/coin-master-mod-apk-hack-game-hack In PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-spins-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/royalty-free-music-one-sirius-beats-roblox-id_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-online-free-no-download_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-112-hacked-client_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-daily-rewards-link_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/roblox-download_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/tiktok-free-zong_GM835599320.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-hack-com_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-packs-free_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-hack-online-android_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-hack-spin-ios_GM406889139.pdfIn PDF document text

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