Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc0b5c6621b92c30…

MALICIOUS

PDF

41.4 KB Created: 2021-05-15 09:08:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 30d8f65ac5941a01f52aca9e7ab64d08 SHA-1: 7201dffdd45e02284232ab21dcf9462d08b0caf1 SHA-256: dc0b5c6621b92c30f0645ac2d2ca37f26b9f737a69baeada75faf9c9f99a0d0b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with "game hack" themes, indicating a phishing or malware distribution attempt. The embedded links, such as https://netcdn.xyz/app/406889139/free-coin-master-gift-link-game-hack, are designed to lead users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and heuristics strongly suggest malicious intent via link manipulation.

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-coin-master-gift-link-game-hack In PDF document text
    • http://mb-alati.hr/files/earn-robux-today-earn-robux-today_GM431946152.pdfIn PDF document text
    • https://www.mb-alati.hr/files/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://mb-alati.hr/files/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://mb-alati.hr/files/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • https://www.mb-alati.hr/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.mb-alati.hr/files/coin-master-34-5-hack_GM406889139.pdfIn PDF document text
    • http://mb-alati.hr/files/can-you-really-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://mb-alati.hr/files/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://mb-alati.hr/files/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • http://mb-alati.hr/files/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://mb-alati.hr/files/cm-spin-link_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.mb-alati.hr/files/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/rbx-claim_GM431946152.pdfIn PDF document text
    • http://mb-alati.hr/files/coin-master-free-spins-apk_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_off00004763.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4763 25276 bytes
SHA-256: d7833a888713ea26b9efdd34982ccc13569f4b6affe567a514dbea9b3e5b0674
font_01_sfnt_off000080d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80D3 17880 bytes
SHA-256: 1ab37f68d76bb6673fe7e3ee425fbe9bd5389a518523b888c567f62bdf1aff93

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