Malicious PDF — malware analysis report

Static analysis result for SHA-256 849b4f8232a0fec3…

MALICIOUS

PDF

42.5 KB Created: 2021-05-13 14:17:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 94463c8940e531167641dd8cda516c6b SHA-1: 5bd44c7d6dca7a0b7c4f39fd66a744d6e36dfcb3 SHA-256: 849b4f8232a0fec3ac1bc8aa5e271ebdc691fc0761246a1c291966ff084db9fe
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically advertising "free generator / game hack" lures. The primary redirector URL is https://netcdn.xyz/app/406889139/legit-coin-master-hack-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack designed to lead users to potentially malicious content or further downloads.

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/legit-coin-master-hack-game-hack In PDF document text
    • http://www.dimalcco.com/images/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • http://www.dimalcco.com/images/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://www.dimalcco.com/images/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • http://www.dimalcco.com/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://www.dimalcco.com/images/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://www.dimalcco.com/images/free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://www.dimalcco.com/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.dimalcco.com/images/coin-master-shield-hack_GM406889139.pdfIn PDF document text
    • http://www.dimalcco.com/images/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://www.dimalcco.com/images/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.dimalcco.com/images/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.dimalcco.com/images/microsoft-robux_GM431946152.pdfIn PDF document text
    • http://www.dimalcco.com/images/coin-master-free-spins-link-download-free_GM406889139.pdfIn PDF document text
    • http://www.dimalcco.com/images/free-outfits-roblox_GM431946152.pdfIn PDF document text
    • http://www.dimalcco.com/images/blox-rewards_GM431946152.pdfIn PDF document text
    • http://www.dimalcco.com/images/free-800-robux_GM431946152.pdfIn PDF document text
    • http://www.dimalcco.com/images/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • http://www.dimalcco.com/images/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • http://www.dimalcco.com/images/free-coins-coin-master-today_GM406889139.pdfIn PDF document text
    • http://www.dimalcco.com/images/free-robux-hack-generator_GM431946152.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_off00004866.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4866 26280 bytes
SHA-256: 21dbb3055693d25bcdb680828d7f7c7467b547f564bb4938d5116c9d141c7e80
font_01_sfnt_off000084a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84A4 18004 bytes
SHA-256: fa7ced444b4122895ad45f2edf1c5e7fc3242d5e911e2066b19dfc8b4f7e6d2c

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