Malicious PDF — malware analysis report

Static analysis result for SHA-256 f878c9483f437997…

MALICIOUS

PDF

33.3 KB Created: 2021-06-26 03:26:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 57901922541e071e25c301d87c01c015 SHA-1: c951eab05fd8c7a7d39b260bbcf0bfa233df3f59 SHA-256: f878c9483f4379976b81c7f145e1d393cadb1b9919b1309e2317e608f06174e1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free currency to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or malware. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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 http://netcdn.co/app/431946152/hack-roblox-with-kali-linux-game-hack In PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/free-daily-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/free-robux-download_GM431946152.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/gift-card-codes-free-roblox_GM431946152.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/free-robux-denis_GM431946152.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/free-robux-now_GM431946152.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/free-robux-via-offers_GM431946152.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/free-roblox-stricid-codes_GM431946152.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/free-robux-scratch_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002b64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B64 22212 bytes
SHA-256: 57e0d446985380eed79868542a21837d73e1a8bb1c5cab3eeee3951c96115bd4
font_01_sfnt_off00005c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C51 19384 bytes
SHA-256: 5212118c265fbd511de480dd761b5be19cf879dd80c92f9257d84781e9a908a5

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