Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ec97570ae2546cb…

MALICIOUS

PDF

42.1 KB Created: 2021-05-19 00:07:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6135bfbc180e8ac2fb8f521a9af4d6bf SHA-1: d287c1c10e711ff7a81c55f7094a01f726ac18ae SHA-256: 6ec97570ae2546cb53582ddcdc4d4d6fabfaf5de32f5c89cfa06f9cecacc8d2f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The ML classifier also flagged this PDF as malicious with high confidence. The presence of embedded URLs and the nature of the lures suggest an attempt to trick users into visiting potentially harmful sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/daily-coin-master-free-spin-link-game-hack In PDF document text
    • https://www.tdbaska.hr/files/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://www.tdbaska.hr/files/free-spins_GM406889139.pdfIn PDF document text
    • http://www.tdbaska.hr/files/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • http://www.tdbaska.hr/files/hack-coin-master-dzooka_GM406889139.pdfIn PDF document text
    • http://www.tdbaska.hr/files/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/roblox-old-avatar_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://www.tdbaska.hr/files/free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/roblox-free-robux-hack_GM431946152.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_off0000478c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x478C 25376 bytes
SHA-256: 2779028f0d61fae657c85a53b535232cb09d6f4e5f357769ea5c49bb68464964
font_01_sfnt_off0000818d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x818D 18476 bytes
SHA-256: 0e8ff706f766ebeac8fd51df3b46864e48e50accc558ba14dc70aa8347bf43ac

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