Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ed97bbf3ed93b48…

MALICIOUS

PDF

46.9 KB Created: 2021-06-03 07:22:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 85e38d618c594a1b87c54901fa752a4a SHA-1: 0719cdf5c59094441b024de85a2a26a80d95e015 SHA-256: 8ed97bbf3ed93b48834b4aa5897a8a6157b14c8db6841099b7fdf659154b3fea
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a malicious redirector, disguised as a 'free generator' or 'game hack'. The primary lure is 'Free Spins Coin Master 2021', directing users to the URL https://netcdn.online/app/406889139/free-spins-coin-master-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or scam attempt designed to lead users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/406889139/free-spins-coin-master-2021-game-hack In PDF document text
    • http://library.umla.ac.id//repository/instant-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-mod-version-free-download-34-4_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-make-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/tiktok-free-folowers-75_GM835599320.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/rbx-com_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-116-apk-download_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/roblox-com-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52E4 24336 bytes
SHA-256: c4512995bcbaf085a4dd389889c6d21d7ce0aa140fa8c92553dcf22e41deb0c1
font_01_sfnt_off00008ada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ADA 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off0000948d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x948D 18288 bytes
SHA-256: 9732707b45c862b7a6ef8ea2418900def9be3650c6b325207d932644f64622ad

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