Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c3062dd1b525541…

MALICIOUS

PDF

43.9 KB Created: 2021-05-12 14:34:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 187092a2b2cd8161589d6d4791a38e6d SHA-1: 91fb65e3039098dc41081be1c222f90a88a67aab SHA-256: 1c3062dd1b52554169ca7ec990bc7234b0abd6f8f9b70e5197aabbb9429d24fd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'game hacks'. The primary lure URL is https://netcdn.xyz/app/406889139/free-spin-coin-master-link-today-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack, likely intended to lead users to a malicious site. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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-spin-coin-master-link-today-game-hack In PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/microsoft-rewards-robux_GM431946152.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/is-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/coin-master_GM406889139.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/free-roblox-premium_GM431946152.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/coin-master-generator-free_GM406889139.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/coin-master-hack-extension_GM406889139.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/coin-master-online_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a59.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A59 29864 bytes
SHA-256: d5d7a30e6b87b62452a890a9fc41877dde58574e58782ce011235c794b601b38
font_01_sfnt_off00008c0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C0A 18412 bytes
SHA-256: b350531339c9517a18660b7b0575dfec4269b2a4083a2d9381830f178b2ed085

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