Malicious PDF — malware analysis report

Static analysis result for SHA-256 435ca27cae1ccf4e…

MALICIOUS

PDF

42.9 KB Created: 2021-06-03 07:31:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4ad1169364c8157189ab57ff828725fa SHA-1: 3cd28c936810bc589c234045b31e434e738985ae SHA-256: 435ca27cae1ccf4e993f1761efb8d66d76f0f02c7acbf6ebbe6af98a00a4d243
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-confidence heuristic indicating it links to a game hack lure. The embedded URL, https://netcdn.online/app/406889139/coin-master-com-game-hack, likely directs users to a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a social engineering tactic to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://netcdn.online/app/406889139/coin-master-com-game-hack PDF link annotation
    • http://lib.stie-aub.ac.id/repository/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/pubg-uc-center_GM1330123889.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-free-pets_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/robux-premium_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FB5 24184 bytes
SHA-256: 38af658eb7a2d5b2fe12bf0e16e742384f17ada6316962a5d0a67d042a46b556
font_01_sfnt_off00008638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8638 17808 bytes
SHA-256: 5f65e9ddf4afff1d2178ae18e232f1b2eabc64818bd3dec8ef63fd22011a84fb

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