Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a747206034bca26…

MALICIOUS

PDF

44.6 KB Created: 2021-05-13 23:31:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 09b8f91937d69db1e7218c8193d0c80b SHA-1: 5b69095fc792f830fc604237b654916031e7a41c SHA-256: 4a747206034bca26879bfc1316e6badf6a27dbaac2bb5388b7b2b8c765ce8ff8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically promoting 'free generators' and 'game hacks' for popular games like Coin Master and Roblox. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves luring users to potentially malicious websites via these deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/coin-master-free-spins-2021-game-hack In PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/hack-coin-master-game-apk_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/coin-master-free-generator_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/coinmaster_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/coin-master-free-box_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/www-rbx-com_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-unlimited-coin-master-online-tool_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/coin-master-hack-no-root_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/easy-robux-generator_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/2021-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ae3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AE3 24176 bytes
SHA-256: 13ab50b15b9dd0a70123a7d9da42f7d79974ba6c36d3fa64b5bb07123edf9b75
font_01_sfnt_off000081dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81DD 2868 bytes
SHA-256: d2d857e2ddc1082c7667b23f2135a5c0ba26a2ff8b42c86c89c8e0b09aece855
font_02_sfnt_off00008bc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC7 18288 bytes
SHA-256: 9f7609fba99e53c6baa99bb04d1c7e3f9b7167131c1520eb2a413cdab4a14871

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