Malicious PDF — malware analysis report

Static analysis result for SHA-256 e456c6b10b087f90…

MALICIOUS

PDF

42.9 KB Created: 2021-05-19 18:32:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 80918fa81d7c421b5fed2e38a3aab9c6 SHA-1: ad84d3890df1e8cc6b004e1975454d9dbe12bdc0 SHA-256: e456c6b10b087f90831feadb0fd18a75c1ac61021e9e346fc303fe33fca91048
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising game hacks and cheats. The primary lure URL is https://netcdn.xyz/app/406889139/free-spin-link-coin-master-app-game-hack, which is associated with a critical heuristic finding. The document body, though partially corrupted, contains similar URLs and metadata indicating it's a lure for potentially unwanted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/free-spin-link-coin-master-app-game-hack In PDF document text
    • http://cosver.eu/images/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/pubg-770-uc-hack_GM1330123889.pdfIn PDF document text
    • http://cosver.eu/images/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://cosver.eu/images/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
    • http://cosver.eu/images/make-robux_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://cosver.eu/images/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/easy-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/roblox-sued_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-root-hack_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_003_off00004978.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4978 29044 bytes
SHA-256: 43488209ac5f9ca7d1e2d02eb2913351409a540a80a6edcf4e7ad3b21bc1be90
font_01_sfnt_off0000864e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x864E 18056 bytes
SHA-256: ebbf7a22afcd0cf508ceb812a131aae4598156f522305d6cc1c9940cc11c625a

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