Malicious PDF — malware analysis report

Static analysis result for SHA-256 f52dbff6ef9c8f10…

MALICIOUS

PDF

43.0 KB Created: 2021-06-03 05:23:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 98512de5d03ad42c757093294c3c1322 SHA-1: 7a285b6327027ee60b14b8f61dd96409ddb205c5 SHA-256: f52dbff6ef9c8f10d1d277a03216c000ee5242c074402b6f9b6b29e763c05b8d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting "free generator / game hack" lures. The ML classifier also flagged this document as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to potentially harmful content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

Heuristics 4

  • 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.
  • 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
  • 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/coinmasterfree-game-hack In PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/minecraft-for-macbook-free_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-mster-free_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/pokemon-go-free-app-download_GM1094591345.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/pubg-uc-hack-season-9_GM1330123889.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/haktuts-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/minecraft-windows-10-code-free_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/teach-me-to-hack_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-hack-client_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_off00005039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5039 24560 bytes
SHA-256: 90b66b55a59e9238227e8ba4cbdc4beb269bb4a0af67a9ca6b75bd64e2306811
font_01_sfnt_off000086f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86F1 17808 bytes
SHA-256: ed5fdd5441acd06a3bb02758ac945137dbfa7be696a0962169bf0eb95ec74bb8

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