Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2210323d496cfe2…

MALICIOUS

PDF

41.3 KB Created: 2021-05-19 03:34:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 19996fb1872826a746db096f8c6682de SHA-1: 94b000c9be6c160cfec6c59fda248c88ec0eabb8 SHA-256: b2210323d496cfe21775158dd6f21bd4668fb80cf879ed9fb436dd75f093af93
160 Risk Score

Malware Insights

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

This PDF document employs a common lure, advertising 'free Robux' and 'game hacks' to entice users. It contains multiple links to known malicious redirector infrastructure, specifically pointing to `https://netcdn.xyz/app/431946152/rbx-place-free-robux-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 or download further payloads. No scripts were extracted, but the document structure and embedded URLs strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/rbx-place-free-robux-game-hack In PDF document text
    • https://weddingcards-expert.tw/upload/files/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-coin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/coinmasterhack-club_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/minecraft-free_GM479516143.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/hack-mod-coin-master_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/kachifpro_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/roblox-games-free_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/are-robux-generators-safe_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-coin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-robux-glitch_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/claim-roblox_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_off00004635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4635 24796 bytes
SHA-256: 5541b941ce9bd05b4cf4913446cbca0bbde53df5ba1ed0ba0fd63f5c6d9849af
font_01_sfnt_off00007e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E56 18472 bytes
SHA-256: 30b20ae3df441f067d6970d2fc85ed95190924e4fa28fb295b294374bf1be820

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