Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb73e465fa7bc54f…

MALICIOUS

PDF

34.7 KB Created: 2021-07-06 09:14:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e51e40a473d87aaad62f40239c39ce24 SHA-1: 27a210edbee46f1d7400cfb7dd76e7dc58318068 SHA-256: eb73e465fa7bc54fd975e9616d5c1ff83769eb0b33ab967cc29c863ed9d3ab9e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, which is designed to lure users with promises of game hacks and free currency. The primary redirect URL is http://netcdn.tw/app/406889139/coin-master-daily-free-spins-link-app-game-hack. This indicates a phishing or scam attempt, likely to lead users to further malicious content or credential harvesting pages.

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-daily-free-spins-link-app-game-hack In PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-cheat-engine-hacks-2021_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-robux-really-easy_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-tradelands-cheat-engine_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/pastebin-hack-roblox_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-level-7-roblox-exploitws_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-ninja-animation-free_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-robux-real-hack-2021_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-drama-class-cheat-sheet_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/instalar-roblox-free_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-get-hacks-on-roblox-counter-blox-roblox-offensive_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_002_off00002f8d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F8D 22944 bytes
SHA-256: 91a68c0db0bb2c72f580eb207c0d6de2c704370a84fe259f4e7966dd51acdd5b
font_01_sfnt_off00006358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6358 18768 bytes
SHA-256: 1c5db3f7009fa9a9146ade2cbc2efb97c7baf1b0638c7caf06dc3a4af7679f36

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