Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc84cdf6b3efde5f…

MALICIOUS

PDF

43.4 KB Created: 2021-05-11 16:00:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4658d3a89cf7a785dd22d1ce1c2040a3 SHA-1: b9ce7a805256c40c0e1134dccf8232831951633b SHA-256: bc84cdf6b3efde5f297dade013bbddc2e6f28540d815de77d434095b131c0461
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users to a malicious redirector, disguised as a "game hack" or "free generator". The primary malicious URL identified is https://netcdn.xyz/app/431946152/best-way-to-get-robux-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious redirection and potential further payload delivery, aligning with common phishing and malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/best-way-to-get-robux-game-hack In PDF document text
    • http://skwolcott.com/images/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/minecraft-free-exe_GM479516143.pdfIn PDF document text
    • http://skwolcott.com/images/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/roblox-people-girl_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://skwolcott.com/images/coin-master-free-spins--spins_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/how-to-earn-free-stars-on-coin-master_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/earn-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/coin-master-pro-hack_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/free-spins-for-coin-master-on-1-19-19_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • http://skwolcott.com/images/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/free-links-coin-master_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_off0000472b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x472B 27536 bytes
SHA-256: 597caf1eb32d777b30baaca7eebc412a3ff812ccb3d7cdd0e122f0dbafe4e9ba
font_01_sfnt_off00008613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8613 18560 bytes
SHA-256: d4298167564158e2fe6287b202ed8cba1ae7047430a0487301977ebc109c0fc7

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