Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3437f499057b443…

MALICIOUS

PDF

46.8 KB Created: 2021-05-20 00:18:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a81c8df8647b04c6d43c62d7bace691e SHA-1: ab2ef2ed3ae5c48badd66c5fb749c25547d70cc3 SHA-256: f3437f499057b44316c5b967473ace86e0577ca88682d1ca7775d609f0164d65
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a known malicious domain, masquerading as a game hack generator. The heuristic firings indicate this is a lure designed to trick users into visiting malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or redirection attack, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/robux-hack-me-game-hack In PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/coin-master-daily-gift-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/robux-boost_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/coin-master-hack-unlimited-spins-apk_GM406889139.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/free-robux-master_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/free-robux-no-verification-needed_GM431946152.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bbe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BBE 27480 bytes
SHA-256: 09361f35afd7eead3ff860d748056d2d2d844c2960958f4efa5c400283d139b6
font_01_sfnt_off00008a3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3A 2912 bytes
SHA-256: 02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
font_02_sfnt_off00009437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9437 18444 bytes
SHA-256: 63c17dbc7d8c7d1de0ff2471750372836806f4a6a54ec4612fcacbe2caf81c31

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