Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd407351d0b24a86…

MALICIOUS

PDF

46.3 KB Created: 2021-05-14 16:49:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5196ed97d476bc3aa06fb64e92d9d3aa SHA-1: 7a1a25f9dff81defa86e8a1cf6f57dc151f05720 SHA-256: bd407351d0b24a86c029fbbfd6b75647ec8a4d401a049be4e56f86e8758c5aa0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting "free generator / game hack" lures. The primary malicious URL identified is https://netcdn.xyz/app/406889139/collect-free-spins-coin-master-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt, likely leveraging a client-side exploit or social engineering to achieve its goals.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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/406889139/collect-free-spins-coin-master-game-hack In PDF document text
    • http://www.exikom.com.ua/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://www.exikom.com.ua/images/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://www.exikom.com.ua/images/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.exikom.com.ua/images/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://www.exikom.com.ua/images/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • http://www.exikom.com.ua/images/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://www.exikom.com.ua/images/minecraft-client-download_GM479516143.pdfIn PDF document text
    • http://www.exikom.com.ua/images/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.exikom.com.ua/images/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://www.exikom.com.ua/images/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://www.exikom.com.ua/images/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://www.exikom.com.ua/images/coin-master-support_GM406889139.pdfIn PDF document text
    • http://www.exikom.com.ua/images/robux-sites_GM431946152.pdfIn PDF document text
    • http://www.exikom.com.ua/images/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://www.exikom.com.ua/images/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://www.exikom.com.ua/images/coin-master-hack-tool-for-pc_GM406889139.pdfIn PDF document text
    • http://www.exikom.com.ua/images/coin-master-70-spin-link_GM406889139.pdfIn PDF document text
    • http://www.exikom.com.ua/images/coin-master-free-daily-spins-today_GM406889139.pdfIn PDF document text
    • http://www.exikom.com.ua/images/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://www.exikom.com.ua/images/what-is-robux_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
stream_003_off00004b45.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B45 34888 bytes
SHA-256: caf42146664e2a79cdf9e3d3fd95d69d109051b1ed64bbe92ca26376a1a1e1f9
font_01_sfnt_off000093e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93E7 17960 bytes
SHA-256: 56908844ab102c912342fec259dbf5a97100868d5d877c05497f82053eb67f28