Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ff5731f1ce00d5…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 10:12:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c45e325568e2bc12860367899d8526e5 SHA-1: b6075978accd7c7e03b0a951191ff4c3809a7627 SHA-256: 65ff5731f1ce00d523b92fbe5968e4ec7254463f4149f30bba7d2b8437781a88
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, including one pointing to known malicious redirector infrastructure at http://netcdn.tw/app/431946152/free-roblox-generator-game-hack. The document body and heuristics indicate a lure for game-related cheats or generators, a common tactic for phishing or malware distribution. While no scripts were explicitly extracted, the nature of the links and the lure suggest the PDF is designed to redirect users to potentially harmful content.

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/431946152/free-roblox-generator-game-hack In PDF document text
    • https://domc.tw/upload/files/roblox-hack-car-crushers-2_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • https://domc.tw/upload/files/how-to-hack-and-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/free-robux-avatar-with-private-group_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/wwwrobloxcheat-de_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/free-robux-real-real_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://domc.tw/upload/files/como-conseguir-diamantes-en-royale-high-roblox-hack_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
    • https://domc.tw/upload/files/free-build-sims-4-roblox_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://domc.tw/upload/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • https://domc.tw/upload/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/play-minecraft-free-online-no-download_GM479516143.pdfIn PDF document text
    • https://domc.tw/upload/files/robux-free-com_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/haktuts-coin-master-today_GM406889139.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_off00003147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3147 22504 bytes
SHA-256: 3392f8248e791b9890d2b3c239c73cb308ff58ce0e3709a60efcd7ecd57609b3
font_01_sfnt_off000063b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B0 18752 bytes
SHA-256: 7a858cebcbb43583261fc6928f7757faac90e9e6cc2d406a534a148fe309e18e

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