Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ddf799029c000b0…

MALICIOUS

PDF

35.0 KB Created: 2021-07-06 08:45:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 43bf7aaf83d2abd8ad443f37152243e9 SHA-1: 103414d77192252103f78770227ad6300f2c0ab2 SHA-256: 3ddf799029c000b0d7e893070d90328066116352aecdb3f5e378f369e92f98b4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirector infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games. The primary lure URL is http://netcdn.tw/app/431946152/roblox-free-hats-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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/431946152/roblox-free-hats-game-hack In PDF document text
    • https://www.summerland.com.tw/upload/files/do-robux-generators-work_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-someone-hacked-a-server_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-games-coin-master_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/all-anthro-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/robux-free-robux_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/how-to-damage-hack-on-roblox-mad-paintball_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-sandbox-cheats_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-adopt-me-money-hack-2021-script_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-robux-come_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/how-to-get-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/best-free-roblox-exploit-2021_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/bee-swarm-roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-gift-hack_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-com-robux_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/minecraft-reach-hack_GM479516143.pdfIn PDF document text

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