Malicious PDF — malware analysis report

Static analysis result for SHA-256 887056981e6f481a…

MALICIOUS

PDF

53.0 KB Created: 2021-06-03 18:41:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 36b6646f4e254f6921fcdb46c81be7e7 SHA-1: a0bf0e3cc301e2a27d355576d53839ee06947c26 SHA-256: 887056981e6f481a032e403a1208ab10b61b7ff0a34b1d9eb3671d67928c929d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it links to malicious redirector infrastructure, specifically advertising a 'free Roblox executor game hack'. The embedded URL leads to a known malicious domain, suggesting a phishing or scam attempt. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest a malicious workflow designed to trick the user into visiting a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9607

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 https://netcdn.online/app/431946152/free-roblox-executor-game-hack In PDF document text
    • https://www.wcauk.org/uploads/files/files/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/www-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/coin-master-hack-android-2021_GM406889139.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/minecraft-mojang-free_GM479516143.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/earn-free-robux_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/microsoft-store-robux_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/tiktok-for-free-online_GM835599320.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/how-to-get-coin-master-free-spins-in-email_GM406889139.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000537b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x537B 27680 bytes
SHA-256: d2f9aee167222565dc3d0c409d4f3b26c21ce81b5b5f770eeb066e821ef2873b
font_01_sfnt_off0000927e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x927E 2984 bytes
SHA-256: 889cfc2fd0afa9ea114d6666204c6ce0548d0aae2cba345827d317498c4c06bc
font_02_sfnt_off00009ca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CA5 6636 bytes
SHA-256: 62075f0fe13502d46afb6e55e83d440c29ef4988399537df1f86e7653ce3b744
font_03_sfnt_off0000acb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACB2 18192 bytes
SHA-256: aee71e4758d3f369cf1e3ec5c54acee68a6a8a95a34d59606e1594aaec7d96dc

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