Malicious PDF — malware analysis report

Static analysis result for SHA-256 87281db86472920e…

MALICIOUS

PDF

33.4 KB Created: 2021-06-27 17:07:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: af3aeaaa6bf45f8b5f1d5bcaaf23a9a5 SHA-1: e397eafc2b26df2a6349a1b2579c22e8077a7943 SHA-256: 87281db86472920e3d4e585a742c228a02bc31864aae46e4735f3de6046ca678
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to external websites, including a known malicious redirector at http://netcdn.co/app/431946152/roblox-how-to-get-free-gui-game-hack. The document body and heuristics suggest a lure for game hacks or free in-game currency, designed to trick users into visiting these malicious sites. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or further stages of an attack.

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/roblox-how-to-get-free-gui-game-hack In PDF document text
    • http://www.peterbarsony.com/userfiles/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/free-roblox-dll-injector_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/roblox-cheat-engine-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/how-to-duplicate-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/how-do-you-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/how-to-hack-a-game-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/united-gaming-net-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/how-to-get-free-robux-in-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CC5 21916 bytes
SHA-256: a9bca5b1374335af3e4ff432bcbf3f5057f249c689f381a0b921b52e3964c1c2
font_01_sfnt_off00005d35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D35 19180 bytes
SHA-256: e6b7245ed7461bab38131b253b37abef92a29e25d7b06d07263e9f1a1be41bd1

Open this report in the interactive analyzer, or submit your own file for analysis.