Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8cdee932bcbb8d4…

MALICIOUS

PDF

35.4 KB Created: 2021-06-27 16:34:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8471440024132c8b0d4fba3abea73ee5 SHA-1: 70c40bac11bffc113d25525ef701c9cc5305c8d2 SHA-256: f8cdee932bcbb8d4e14b6899a8480d190c2ba80440d8eea0b8f72371e8c49da0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators' to lure users. The primary redirector URL identified is http://netcdn.co/app/431946152/how-to-hack-oney-on-ud-roblox-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate a phishing or scam attempt designed to lead users to potentially harmful content or further malicious downloads.

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/how-to-hack-oney-on-ud-roblox-game-hack In PDF document text
    • http://knjiznica-oroslavje.hr/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/how-to-unblock-roblox-hack-a-wifi-password-on-computer_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/pubg-uc-dark-web_GM1330123889.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/give-free-robux_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/robux-free-co_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/roblox-hide-and-seek-extreme-hack_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/pubg-uc-hack-2021_GM1330123889.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/roblox-cheat-enginescript-injector_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/get-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-roblox-account-generator-youtube_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/tiktok-free-online_GM835599320.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/coin-master-hack-no-human-verification-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
stream_002_off00003266.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3266 22628 bytes
SHA-256: 85f3b3501e75372a310f373443084e4a776c103f45f1f937c503857a3bf377e6
font_01_sfnt_off000064e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E2 19172 bytes
SHA-256: b23fe79ca2972489c12eada4fdc323432c32f5a447850b8f21df698071bc5ccd

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