Malicious PDF — malware analysis report

Static analysis result for SHA-256 66d17fc596a7d591…

MALICIOUS

PDF

42.6 KB Created: 2021-05-12 22:32:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1d2dedc8ec7a2b7fc04598699fb244b7 SHA-1: 860967b9bd6881663f3e49a33e1174cffb6499bd SHA-256: 66d17fc596a7d5911bf95ecdf5f035bc8a97702ebbadb9dad3419ae60dd91652
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 'game hack' lure. The embedded URL, https://netcdn.xyz/app/406889139/free-spins-coin-master-links-2021-game-hack, likely serves as a redirector to a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick users into visiting a potentially harmful resource, aligning with a phishing or social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/free-spins-coin-master-links-2021-game-hack PDF link annotation
    • https://library.univthamrinaka.com/repository/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/minecraft-for-free-apk_GM479516143.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/coin-master-heaven-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/roblox-rewards_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-spins-october-28-2021-coin-master_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/coin-master-daily-free-coins-link-today_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/minecraft-client-download_GM479516143.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/coin-master-mod-apk-hack_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/how-to-use-wurst_GM479516143.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/robux-game-com_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/roblox-free-items_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
stream_003_off00004ba4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BA4 24892 bytes
SHA-256: b3e6593b66dda69ea9f97b8856cd97bae7d922c35f3db3ff384ec84f178d1beb
font_01_sfnt_off000083b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83B3 18456 bytes
SHA-256: c809cb62993c96a2792eb05fd7593de41ec7ce02e3f179f2cd9cbcb899f0cf70

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