Malicious PDF — malware analysis report

Static analysis result for SHA-256 4475e5c3ffe9291b…

MALICIOUS

PDF

45.0 KB Created: 2021-05-10 23:01:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cb7d6766aaf997d3e6bf7960c47931b8 SHA-1: b6517eacb6dcc97d6f5dddb07fe5327d751cf2ba SHA-256: 4475e5c3ffe9291be2fb9576bd7414301b4fd163ec89f9bc263696931ff79ff7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure and game hack lures, indicating a phishing or scam attempt. The embedded URLs are designed to lead users to potentially malicious sites. Although no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit user interest in free game items to drive traffic to malicious domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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.xyz/app/406889139/coin-master-free-spins-link-today-new-game-hack In PDF document text
    • http://librarysenior.com//repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-ios-hack-download_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-working-hack_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://librarysenior.com//repository/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/ios-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/roblox40com-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-hack-no-survey_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-club-hack_GM406889139.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_003_off00004aa8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AA8 24688 bytes
SHA-256: c09f34cf2465eef2782572a05bcd1d4162e9b001db7620aa91767d3f1f3de908
font_01_sfnt_off000082e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82E1 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off00008c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C81 18572 bytes
SHA-256: 51c95658009ee6a6ae875a8d4133a79c51d36fbd34bac1203a2f2fe060da7c96

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