Malicious PDF — malware analysis report

Static analysis result for SHA-256 78283b27809ec016…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 02:40:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b64a62ccf42a3c896c3ccff0e56d41d1 SHA-1: e5691a4c7efbeb99613cb9a73bb20b7830281ea6 SHA-256: 78283b27809ec0164179cadfe1680e2624af890505620dc11ce2bf741ab8606f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically advertising 'free generator / game hack' content. The primary redirector URL is http://netcdn.tw/app/406889139/daily-coin-master-free-spin-link-game-hack. While no scripts were explicitly extracted, the presence of numerous embedded URLs and the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic strongly suggest a phishing or scam campaign designed to lead users to potentially malicious sites.

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/daily-coin-master-free-spin-link-game-hack In PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-programers_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/pubg-uc-kodu-yazma_GM1330123889.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/roblox-points_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/pastebin-hack-robux-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-hack-without-survey_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-headless-head-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-bc-on-roblox-pc_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/instante-break-block-roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/scp-lockdown-roblox-game-cheats_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/irobux-com-redeem_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-pc-2021-not-patched_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-spins-link-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-without-signing-up_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-hack-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_002_off000030a7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30A7 23028 bytes
SHA-256: 3424da8bb248e59f91349fa2a1e2fddd680a44b0073f5739142b7c235f9e84f6
font_01_sfnt_off00006478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6478 18768 bytes
SHA-256: 6995f58a3344afdf1c39eea442142c3f86a5b05fd2aa483286546d573d63d37d

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