Malicious PDF — malware analysis report

Static analysis result for SHA-256 51ef9d44bd0c2139…

MALICIOUS

PDF

12.2 KB Created: 2021-07-05 11:12:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0e7edafd72784e089d744269f51a748c SHA-1: 8c06f2e432c1ab771ec5b760825fff25911341cb SHA-256: 51ef9d44bd0c2139023cdfda136e263ee32dd76e3a1c97ab61f592b9a319443d
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/431946152/how-to-get-100-robux-for-free-game-hack. The document body explicitly mentions 'How To Get 100 Robux For Free' and 'game hack', indicating a lure for potentially unwanted or malicious content. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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/how-to-get-100-robux-for-free-game-hack In PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/how-can-you-get-free-donations-in-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/roblox-script-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/android-coin-master-3433-apk-hack_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/how-to-get-hacks-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/roblox-mineverse-cheats_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/h1-class-free-robux-123-576-678-h1_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/necklace-roblox-free-shipping_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/how-to-get-free-roblox-gear-2021_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-hack-tuts_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/roblox-hack-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/how-to-leak-a-roblox-map-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/moonactive-free-spins-link_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/www-robux-com_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-heaven-free-spins-link_GM406889139.pdfIn PDF document text

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