Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f4451dfb18a0eb4…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 05:43:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 19bb52953273a2015fcecc90084ccc41 SHA-1: 7685acd05561d0b8311aeffffe2bcfc10aae113b SHA-256: 9f4451dfb18a0eb432426c8708a47e57e4e9d855c717be862632c8f8d497da49
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' redirector, specifically mentioning Coin Master. The document body and embedded URLs reinforce this lure, directing users to a URL hosted on 'netcdn.tw'. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/where-can-i-get-free-spins-for-coin-master-game-hack PDF link annotation
    • http://lib.uho.ac.id/library/repository/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/hack-coin-master-link_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/tiktok-free-or-paid_GM835599320.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/games-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/can-i-have-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/roblox-sued_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/minecraft-mod-updater_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-hacks-download-free-dll_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-xbox-one-code-free_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/get-coin-master-spins-free_GM406889139.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
stream_002_off0000302b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x302B 23140 bytes
SHA-256: 913f92a681a38e2c805cb67d99f300b1cd5ab82b7dfd0aae4541f48034432e5a
font_01_sfnt_off000063d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D3 18540 bytes
SHA-256: b12aa12d38c8c524e7797586759798b9ea71944b9981e44aaeae315634813687

Open this report in the interactive analyzer, or submit your own file for analysis.