Malicious PDF — malware analysis report

Static analysis result for SHA-256 943b6185d3109e8b…

MALICIOUS

PDF

35.0 KB Created: 2021-07-03 12:07:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ea3c3ee8dcf46148c532f0980d4b2044 SHA-1: 8e43c8e6321c7b5d5973b142444b17de7e59586d SHA-256: 943b6185d3109e8b2a7a07d375976248558715555b8a1505449d7e5ccaeae441
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that lead to a known malicious redirector, specifically advertising 'Coin Master Free Spins' and 'game hacks'. The ML classifier and heuristic firings strongly indicate malicious intent, likely to redirect users to a phishing or scam site. No scripts were extracted, but the document's structure and embedded URLs point to a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.tw/app/406889139/coin-master-free-spins-link-blogspot-2021-game-hack In PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/redeem-roblox-promotions-free-robux_GM431946152.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/get-free-roblox-avatar-items_GM431946152.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/how-to-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/robuxy-com-generator_GM431946152.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-clothes-roblox-2021_GM431946152.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/free-robux-claim-gg_GM431946152.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/hack-robux_GM431946152.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/free-robux-scam_GM431946152.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/link-for-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/cheat-engine-speed-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/robux-free-c_GM431946152.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/jailbreak-roblox-hack-mega_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_off00003110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3110 22660 bytes
SHA-256: 775360931ac9010685c1515990b6d13dcdd02a93d7a37fd2b99de8fd57173f95
font_01_sfnt_off00006408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6408 19036 bytes
SHA-256: f868d1b4b008750abeb491aae720fc8315e02cd8dd3bcefbbcb1193d1ab016b5

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