Malicious PDF — malware analysis report

Static analysis result for SHA-256 82b8e90e81acf32c…

MALICIOUS

PDF

35.5 KB Created: 2021-06-22 21:04:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9c5c777e39c2318b136ec0044b45f1b2 SHA-1: acaf31ac48582819debe49169af6c0ca60b110e6 SHA-256: 82b8e90e81acf32c971774227982eb72f512d3acd2a4ebc8d128e6bb002b6503
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 'free generators' and 'game hacks' for popular games. The primary lure URL is http://netcdn.co/app/431946152/free-dominus-roblox-catalog-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to drive users to potentially malicious websites, likely for credential harvesting or further malware delivery.

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/free-dominus-roblox-catalog-game-hack In PDF document text
    • https://www.wessexandrology.com/uploads/files/files/free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/hack-client-maker-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/roblox-portal-heroes-cheats_GM431946152.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/how-to-hack-roblox-accounts-without-inspect-element_GM431946152.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/minecraft-java-free-account_GM479516143.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/coin-master-free-spins-through-coin-pop_GM406889139.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/free-robux-no-verification-2021_GM431946152.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_off00003445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3445 21972 bytes
SHA-256: f4cb8509d4f40aed9853455b393e17b20b8f4690913353110572016f446a352b
font_01_sfnt_off000064bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64BB 19440 bytes
SHA-256: cac6c92759e201b70cdfe4d1e8b784f1e8a808c3f8e383ab3ebf3f653c139425