Malicious PDF — malware analysis report

Static analysis result for SHA-256 77ada7b63b38e246…

MALICIOUS

PDF

40.8 KB Created: 2021-05-17 09:02:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e0c9a9183021cc07534b8b3acc670071 SHA-1: d643ffe21580d3db1efab990d5b257183d328a68 SHA-256: 77ada7b63b38e24684fad34413e2766bb860bddb0343d6b92294eb4593ecf9b3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'free generator / game hack' lures. The ML classifier also flagged this PDF as malicious. The embedded URLs suggest a campaign focused on distributing malware or phishing for credentials related to popular online games.

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/free-spins-and-coins-coin-master-game-hack In PDF document text
    • http://taskcyg.nl/images/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • http://taskcyg.nl/images/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/roblox-com-games-referrer-roblox-player_GM431946152.pdfIn PDF document text
    • http://taskcyg.nl/images/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • http://taskcyg.nl/images/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://taskcyg.nl/images/coin-master-hack-online_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://taskcyg.nl/images/blox-rewards_GM431946152.pdfIn PDF document text
    • http://taskcyg.nl/images/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/coins-master_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/coin-master-free-400-spin-link_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/free-rare-cards-for-coin-master-christmas_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/roblox-rewards_GM431946152.pdfIn PDF document text
    • http://taskcyg.nl/images/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • http://taskcyg.nl/images/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/link-for-free-spins-on-coin-master_GM406889139.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
stream_003_off0000466a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x466A 24280 bytes
SHA-256: 92b47a930b62304688b43845e04807aba494d54c13f6935e0b7d423f185aaaea
font_01_sfnt_off00007d81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D81 18060 bytes
SHA-256: d4954d2d00bde9f6a1061857a61d2c62c1ae360f44744af150ee923481526d51

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