Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d6bb83f04ed8891…

MALICIOUS

PDF

34.7 KB Created: 2021-06-26 15:56:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9ab1e36df8c781fa9a490e79876d0ef0 SHA-1: e6cc61b98b76e0bdcba669c28112f9d3aa5599a4 SHA-256: 4d6bb83f04ed88914b7413e933b6dea4509155517764f22df8f904cac6c47e93
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games like Roblox and Coin Master. The primary lure URL is http://netcdn.co/app/431946152/roblox-free-bundles-2021-game-hack, which likely leads to a further malicious download or phishing page. The ML classifier also strongly indicated maliciousness.

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-free-bundles-2021-game-hack In PDF document text
    • https://shjbottle.com/upload/files/cheat-roblox-offensive_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://shjbottle.com/upload/files/free-robux-co_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/coin-master-free-food-for-pet_GM406889139.pdfIn PDF document text
    • https://shjbottle.com/upload/files/free-roblox-intros_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/moonactive-free-spins-link_GM406889139.pdfIn PDF document text
    • https://shjbottle.com/upload/files/hack-roblox-servers_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://shjbottle.com/upload/files/descargar-roblox-hack-robux_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://shjbottle.com/upload/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://shjbottle.com/upload/files/coin-master-hacks-no-human-verification_GM406889139.pdfIn PDF document text
    • https://shjbottle.com/upload/files/can-i-wear-clothes-i-make-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • https://shjbottle.com/upload/files/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://shjbottle.com/upload/files/how-to-hack-into-anybodys-roblox-account_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/free-tiktok-followers-no-verification-or-survey_GM835599320.pdfIn PDF document text
    • https://shjbottle.com/upload/files/free-roblox-com_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/how-to-hack-people-on-roblox_GM431946152.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_off00003029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3029 22184 bytes
SHA-256: c4f58ad8330199e17b742fad6f5dc9dd71b6be4d9908f949e0ff3dba4ea3b4b1
font_01_sfnt_off00006172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6172 19364 bytes
SHA-256: 6e68850a0cc2f6313ac6ff5be5e3b0ee349d02d4e9fae753ac5b7efbc128725b

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