Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa88facc373643db…

MALICIOUS

PDF

34.1 KB Created: 2021-07-03 11:16:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-06
MD5: 5d86d22cfa90a9c3f99e402a54d6c551 SHA-1: 61949c8d3b9caa6ea65c8342e957f643e1ff6233 SHA-256: aa88facc373643dbdab0759a5c2831c25c9a541223d695584d16d76d6e48f5c1
200 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.tw/app/431946152/free-robux-games-on-roblox-game-hack In PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-hack-generator-online-no-survey_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft-creative-mode-free_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coinmasterfreespins_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-free-800-robux-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-hack-roblox-may-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/10-robux-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/prison-break-roblox-hack-script_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-robux-legit-no-survey_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-hack-coin-master-game-without-verification_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-needs-password_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-sand-simulator-hack-android-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-free-catalog-items-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-levels_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-open-cheat-engine-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-coin_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-cheat-engine-hacks-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_off0000300b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300B 21964 bytes
SHA-256: 70c651b9e321e25189aabd13bfef43803e3176ca3b0244620ab2b7414d1ddd44
font_01_sfnt_off00006055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6055 19052 bytes
SHA-256: 56f4e65812c403ac511da7c683eb66c8172328fd08918d47063ad90a487708b4

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