Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9e067a1840a943e…

MALICIOUS

PDF

35.7 KB Created: 2021-07-05 20:44:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: febd69ad16dccca1ee1f0a5acbbd6de6 SHA-1: c878a7161706b0808692df7b3621c897eb73208b SHA-256: b9e067a1840a943e232f83af58aced01eb10d61c18237f72cd17c6dd97b040ca
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector infrastructure, disguised as free game hacks and downloads. The primary lure is 'Minecraft Free Download Mac Full Version 2021', directing users to http://netcdn.tw/app/479516143/minecraft-free-download-mac-full-version-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or malware distribution attempt.

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.tw/app/479516143/minecraft-free-download-mac-full-version-2021-game-hack In PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/www-rubux_GM431946152.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/hack-avatar_GM431946152.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/how-to-hack-roblox-kazok_GM431946152.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/natevang-free-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/furky-roblox-hacks-blocburg_GM431946152.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/coin-master-village-4_GM406889139.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/girl-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/get-free-spins-coin-master-october-2021_GM406889139.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/is-there-any-way-to-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_off00003545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3545 22148 bytes
SHA-256: facf4073a90526b341126eb7203d5e5c4dc53f7f563dce131fa8c1ff3b084d74
font_01_sfnt_off0000660a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x660A 19256 bytes
SHA-256: ca599e1663261bcb043a8cf43787ba6c6b04e66b48380bac1e41e8a8381ce839

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