Malicious PDF — malware analysis report

Static analysis result for SHA-256 98d60b89a0d0983b…

MALICIOUS

PDF

56.2 KB Created: 2021-05-14 10:49:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f713fa43fb2487d800e87ca3613fd7df SHA-1: 2d0d4a94951fcb5f6659be2cebe283aae3c246c8 SHA-256: 98d60b89a0d0983bb4f9482a61f06fdee7c0ec612323239ca65bd9b7b40dd94b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'free spins' for games like Coin Master. The primary malicious URL identified is https://netcdn.xyz/app/406889139/how-to-hack-coin-master-game-game-hack. The document body and heuristics indicate a lure to download or click through to potentially malicious content, likely leading to further malware or phishing attempts. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8162

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/how-to-hack-coin-master-game-game-hack In PDF document text
    • http://brinicombe.co.uk/images/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/master-coin-hack-app_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/202100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/coin-master-levels_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/coinmaster_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/coin-master-gold-cards-free-link_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
    • http://brinicombe.co.uk/images/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c2d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C2D 27752 bytes
SHA-256: e460b65c8154f7ce8e5274919af61194d560fadd02326e9b8f09aa52eeab8f29
font_01_sfnt_off00008d68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D68 3088 bytes
SHA-256: e7854aff7cbc8fbdeb85d2b3d6248d12dc820ede8a581f4eac107fa6446c2222
font_02_sfnt_off00009833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9833 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000ab59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB59 18140 bytes
SHA-256: 5d184f7874437acb266cbaf4c3c8277ec99de1ce710386c314af5b284946c89b
font_04_sfnt_off0000cce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE2 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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