Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cddc15d2a0dd2cd…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 12:53:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f9d85626e91d65fd654e29d371e2eab1 SHA-1: 37fc7d053d89eae6c2a5e84dabfd323a7e5eb3b4 SHA-256: 6cddc15d2a0dd2cd7597bab513922e5aad3b27620bab5d8c2c09b4180c3ccfb5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into downloading or accessing resources related to game hacks and free currency. The primary link, http://netcdn.tw/app/431946152/robux-win-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at driving traffic to potentially malicious sites, likely as part of a phishing or scam campaign.

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/robux-win-game-hack In PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/the-laughing-unicorn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/download-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-roblox-accounts-2021-august_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-online-hack-robux_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/download-roblox-hack-robux-apk_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/play-coin-master_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-exploit-2021-free_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_off0000301f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x301F 22732 bytes
SHA-256: 2ccb11249355bc2610120012e9c21349192bf163661928d2ec00d174bc0e566b
font_01_sfnt_off000062d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D5 18868 bytes
SHA-256: b7886f95459917ce9979ba5e88b3e17eca9525d8377d3e247e9b6fd470620a4b

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