Malicious PDF — malware analysis report

Static analysis result for SHA-256 6da7dffa6e29d13c…

MALICIOUS

PDF

49.5 KB Created: 2021-06-11 12:38:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b9c2f32fa8d5e113bcd39edf67fd61cf SHA-1: 8caa807658b5ae3e4f18863bc9192f63b35f1dc8 SHA-256: 6da7dffa6e29d13c509a0c07104a04c71366c30457c7960e56ba2f9b757dea25
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to game hacks and free currency to entice users. It contains multiple links, including one pointing to known malicious redirector infrastructure at `https://netcdn.tw/app/431946152/how-to-get-free-unlimited-robux-on-roblox-2021-october-game-hack`. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.tw/app/431946152/how-to-get-free-unlimited-robux-on-roblox-2021-october-game-hack In PDF document text
    • https://weddingcards-expert.tw/upload/files/how-to-get-free-spins-on-coin-master-without-waiting_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-roblox-templates_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/truco-2021-hack-robux_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-roblox-wings_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/atlantis-overlord-bubble-gum-simulator-cheat-code-roblox_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/tiktok-free-like-app_GM835599320.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-robux-no-password_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/coin-master-gift-link_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-roblox-clothes-girl_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/try-minecraft-free_GM479516143.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/tiktok-free-skin-event_GM835599320.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/roblox-executor-free-download_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51A2 25572 bytes
SHA-256: 01bcdd35f4e7ec8e32f738c002e2e39536de489b08334d9a3801f6ab282bc876
font_01_sfnt_off00008cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CCA 6100 bytes
SHA-256: f866077ce59d6ea276f75e4af76daa2aab5f3a1a679df144776123d85664d65c
font_02_sfnt_off00009b56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B56 19496 bytes
SHA-256: e0098c6f3c053eac13b43cc199b55593e4486392c6c11b2e0a288ff8fe5c24f4

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