Malicious PDF — malware analysis report

Static analysis result for SHA-256 7826ab0078b62b72…

MALICIOUS

PDF

42.2 KB Created: 2021-05-11 05:31:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3cbb8ca7a6a9effb2b4830962cee1303 SHA-1: 7903c4e3721f68b5c852669de537843b7df8719f SHA-256: 7826ab0078b62b7239157cf1ac8cf407c8f369397e9354396b0c512d6cc2de6d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generator / game hack' lures for popular games. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-free-spin-download-game-hack, which is likely used to deliver a second-stage payload or lead to a phishing page.

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/coin-master-free-spin-download-game-hack In PDF document text
    • https://schneider-und-berger.de/images/free-robux-earn_GM431946152.pdfIn PDF document text
    • https://schneider-und-berger.de/images/free-robux-exe_GM431946152.pdfIn PDF document text
    • https://schneider-und-berger.de/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://schneider-und-berger.de/images/coin-master-332-apk-free-download_GM406889139.pdfIn PDF document text
    • https://schneider-und-berger.de/images/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://schneider-und-berger.de/images/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • https://schneider-und-berger.de/images/worst-client_GM479516143.pdfIn PDF document text
    • https://schneider-und-berger.de/images/free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://schneider-und-berger.de/images/how-do-i-earn-robux_GM431946152.pdfIn PDF document text
    • https://schneider-und-berger.de/images/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • https://schneider-und-berger.de/images/robux-prices_GM431946152.pdfIn PDF document text
    • https://schneider-und-berger.de/images/como-hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • https://schneider-und-berger.de/images/how-to-get-free-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • https://schneider-und-berger.de/images/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://schneider-und-berger.de/images/free-robux-picture_GM431946152.pdfIn PDF document text
    • https://schneider-und-berger.de/images/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://schneider-und-berger.de/images/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://schneider-und-berger.de/images/coin-master-hack-without-verification-code-2021_GM406889139.pdfIn PDF document text
    • https://schneider-und-berger.de/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://schneider-und-berger.de/images/real-coin-master-hack-2021_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_off00004ab6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AB6 24448 bytes
SHA-256: 08b3fd531b9640aa0cdc688a9f78a5f4785d28cc315af26f5bd500d84a09fa9b
font_01_sfnt_off000081d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81D0 18464 bytes
SHA-256: d2049980b499644707db7dbba33f42fd49626c5cebf4a87bca5165b0820086b7

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