Malicious PDF — malware analysis report

Static analysis result for SHA-256 53345f018a6c0e21…

MALICIOUS

PDF

34.6 KB Created: 2021-06-26 20:01:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e1a11299568d0d6348c130d140958f0c SHA-1: efed7969d4540ddf4d6302bf9f8719b194709e7d SHA-256: 53345f018a6c0e2110fef12780a3ac21ceb73aa6ffacd9f7a2ddfd97fe5174a9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free items, directing users to a known malicious redirector. The document body and embedded URLs reinforce this theme, aiming to trick users into clicking through to potentially harmful content. While no scripts were directly extracted, the PDF structure and embedded links suggest a phishing or social engineering attack vector, likely T1566.001 (Spearphishing Attachment) if delivered via email.

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.co/app/431946152/catalog-roblox-free-items-game-hack In PDF document text
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/hexus-roblox-free-download_GM431946152.pdfIn PDF document text
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/100-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/roblox-hack-download-iphone_GM431946152.pdfIn PDF document text
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/coin-master-hack-online_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_off0000317c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x317C 22000 bytes
SHA-256: e184387c66198af9725ac522232f82ec1af87fb978807a1ba802f479ae55ee6f
font_01_sfnt_off00006239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6239 19016 bytes
SHA-256: b3b48f45abd1e997b7028b75f3f25a67e9e57d797108b1795690322daab9aef9

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