Malicious PDF — malware analysis report

Static analysis result for SHA-256 e17b890fdf943a71…

MALICIOUS

PDF

34.7 KB Created: 2021-07-06 21:36:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9378572b2cfd00b59607f87c2e7d059c SHA-1: 92d38ed786d48f50be5476d29aa05a9d23b9b827 SHA-256: e17b890fdf943a71e00f382bec21b9a5456e751c9e0dd2e92a88aeaf11410481
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs and a document body that promotes obtaining free in-game currency or hacks for popular games like Coin Master and Roblox. The primary URL, http://netcdn.tw/app/406889139/how-to-get-spins-for-free-on-coin-master-game-hack, is likely the intended destination for users seeking these cheats. The ML classifier also flagged this PDF as malicious, supporting the suspicious nature of the content.

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/how-to-get-spins-for-free-on-coin-master-game-hack In PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/get-free-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-hack-in-arsenal_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-using-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/haktuts-free-spins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-gift-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/boku-no-roblox-hack_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
font_00_sfnt_off00003156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3156 22892 bytes
SHA-256: cbc4dfd68a7998eee690137bf22ea8f4f991fd80ac3f70fc3922b4d4c6a6e2cf
font_01_sfnt_off000064f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F5 18336 bytes
SHA-256: a841261eefc9091920f66d88f6abc9f0517b4e443c58d75395461243cacd8539

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