Malicious PDF — malware analysis report

Static analysis result for SHA-256 26eca27d30cf0077…

MALICIOUS

PDF

34.3 KB Created: 2021-07-09 21:31:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2620612a93c89ef59997b57af3510d0a SHA-1: 64d77e23eb8f43575b3f07b45c4ae9a03a2340a6 SHA-256: 26eca27d30cf00770abd0dadc38ab4bb0f8badc203c17d503d01fbc3a2732dfc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free generator / game hack' content, directing users to a known malicious redirector. The embedded URL 'http://netcdn.tw/app/479516143/minecraft-building-hacks-game-hack' is flagged as malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick users into downloading further malicious content, likely through a social engineering pretext.

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/479516143/minecraft-building-hacks-game-hack In PDF document text
    • https://luyenthitoanpro.com/public/upload/files/apps-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/how-to-hack-roblox-accountts_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/coin-master-connection-lost_GM406889139.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/free-roblox-characters_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/hack-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/change-your-roblox-name-for-free-reddit_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/coin-master-free-spins-link-may-2021_GM406889139.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/free-robux-net_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/shirt-ash-on-roblox-free-on-shirt-free-on-shop_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/offers-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/case-clicker-2-hack-roblox_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/free-spins-for-coin-master-2021_GM406889139.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_off0000327f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x327F 21992 bytes
SHA-256: 468309de474f0135c93a0a4878440b6be7a17096e13f326e2a36ef267d8869d6
font_01_sfnt_off000062b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B3 18628 bytes
SHA-256: 03be4b6b10a4c687c6c89c16a3bf013511456428a76c01e3ee63370f4522cf94

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