Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bb902d2ae4e78c5…

MALICIOUS

PDF

47.1 KB Created: 2021-06-03 14:15:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6e8dbfa911906834811021661b70aa24 SHA-1: 5309d21925ca2ad71bd54d4e2f11ecb858548c73 SHA-256: 2bb902d2ae4e78c56a08fea42a6f8d6559c5d18ddb8bdbcc9dfdfa3d491a56b5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically advertising a 'game hack' lure. The embedded URL, https://netcdn.online/app/431946152/game-give-free-robux-game-hack, is associated with this malicious redirection. The document body, though partially corrupted, contains references to this URL and the lure, reinforcing the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.online/app/431946152/game-give-free-robux-game-hack In PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/apps-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/make-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/chisel-and-bits-mod-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/http-blackgamesus-coinmasterhack_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FDB 25928 bytes
SHA-256: b86a1ce6f675367de090bc183dc8e8e570272c390af0b401160bae79e69a1aee
font_01_sfnt_off0000897f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x897F 2984 bytes
SHA-256: a0686adbed44d4bb40d4eba41cd82a3c41b8980eb9be9295372104d429f83de9
font_02_sfnt_off000093d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93D3 18736 bytes
SHA-256: 457049c0c0b067ea8a2ccaf5c24f39a354f8c872058b648fa686429afe9091ea

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