Malicious PDF — malware analysis report

Static analysis result for SHA-256 39759504602e9700…

MALICIOUS

PDF

42.3 KB Created: 2021-05-19 07:03:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9eccf0a9e4dbf86e6e6cbfd45b639a28 SHA-1: a3c60b7149c3d016b39031539174d048d64f83dd SHA-256: 39759504602e9700fe67c420ce1fc28515958c5deb239750a01fe4d9fbd2abe4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'free spins' or 'game hacks'. The primary malicious link identified is https://netcdn.xyz/app/406889139/get-free-spins-coin-master-link-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristics indicate a clear intent to lure users to potentially harmful websites, likely as part of a phishing or scam campaign.

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/get-free-spins-coin-master-link-game-hack In PDF document text
    • http://gbp-trabkiwielkie.pl/images/minecraft-app-store-free_GM479516143.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/roblox-microsoft-rewards_GM431946152.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/free-robux-today_GM431946152.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/coin-master-link_GM406889139.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/worst-client_GM479516143.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/coin-master-free-shield-link_GM406889139.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/hack-coin-master-xyz_GM406889139.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/free-spins-for-coin-master-on-1-19-19_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_off00004a90.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A90 24872 bytes
SHA-256: 970c34f6d45b07b556c23026a5d631b73fdca8dabc0394b22ac3e2fca0f2c0c8
font_01_sfnt_off000083e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83E5 18056 bytes
SHA-256: ab85056fbf29cd03dcfab7de7beb0343ed26656e2e8858e8ad52cb7aa31a5a92

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