Malicious PDF — malware analysis report

Static analysis result for SHA-256 87206cdaad07a075…

MALICIOUS

PDF

32.5 KB Created: 2021-06-19 08:31:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 934da7ff5c1b645c142c492f7673e2a2 SHA-1: 6ad7a159aebd9610a5211cb61b347dc0ef99b591 SHA-256: 87206cdaad07a0757fdfb0e4c4c12c1b97e843aa62e91d108802e18c9534fac8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to malicious redirectors, disguised as "free generator / game hack" lures for popular games like Roblox and Coin Master. The primary malicious URL identified is http://netcdn.co/app/431946152/roblox-profile-picture-free-game-hack. The document's structure and embedded links strongly suggest it is designed to lead users to potentially harmful websites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/roblox-profile-picture-free-game-hack In PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-spin-software_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-hair-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/what-do-points-do-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-roblox-deathrun_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/4-step-way-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-coins-coin-master-today_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/top-10-best-free-roblox-items_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/robux-today_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/robux-hack-no-survey-or-human-verification-no-downloads_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-make-a-free-robux-game-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/hey-google-how-do-you-get-free-robux_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_off00002b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B8C 21304 bytes
SHA-256: 316d770291c42778c6749b51b8d0fb801a33513738d7bf5bd7d377324cd5374b
font_01_sfnt_off00005a11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A11 19168 bytes
SHA-256: 81591da3e1decee0c7b47165ed080998b6a40c590001322d690bf6b5f024ad6c

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