Malicious PDF — malware analysis report

Static analysis result for SHA-256 3daff52d3ad9d82b…

MALICIOUS

PDF

31.2 KB Created: 2021-06-09 16:15:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 507634784d763123ac5b7505dd153763 SHA-1: c53b4129eb7c1028329749294454dbb83cda84a1 SHA-256: 3daff52d3ad9d82b87ce9450bf21fe8ad5f9d14f4b52aab017a902e9a3044608
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on what appears to be a free generator or game hack. These links redirect to malicious infrastructure, specifically identified as a known redirector. The document body, though heavily obfuscated, contains references to Roblox and game hacks, reinforcing the lure. No scripts were extracted, but the primary attack vector is the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 3

  • 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.
  • 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.tw/app/431946152/roblox-palace-free-robux-game-hack In PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-hack-coin-master-game-ios_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/moonactive-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-robux-link_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/body-roblox_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-coin-master-spin-generator_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-robux-no-password_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text