Malicious PDF — malware analysis report

Static analysis result for SHA-256 8966bea127211992…

MALICIOUS

PDF

47.2 KB Created: 2021-06-03 21:14:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 41253f0974d38e8cef1150c7d2034eb9 SHA-1: 598837037a7ae97caf0a3329869d723cd2312c5c SHA-256: 8966bea127211992423a7a47bfb254646b6ea0a5d139586849d89020ef87e1b7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, including one that masquerades as a 'free generator / game hack'. The document body, though heavily obfuscated, contains references to these lures and embedded URLs. The primary goal appears to be directing the user to download potentially malicious content from the provided links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/406889139/coin-master-daily-free-spin-app-game-hack In PDF document text
    • https://kojak-group.com/userfiles/files/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/roblox-executor-free_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/static-moonactive-net-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/https-iosgodscom-topic-20214coinmasterhack_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-tiktok-engagement_GM835599320.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/descargar-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/get-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-spins-coin-master-march-2021_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/haktuts-coin-master-free-spin-link_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050cf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50CF 26028 bytes
SHA-256: d117547f04657e06607604d5564b1598d601e30a695f07dc422d447c98f60797
font_01_sfnt_off00008bd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD5 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00009587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9587 18308 bytes
SHA-256: f9a3a46f76b0cae8a4d9bd0baf07f2a5aefd3f4554b846be65e0119e8f17791d

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