Malicious PDF — malware analysis report

Static analysis result for SHA-256 df6e3fe74397488c…

MALICIOUS

PDF

34.4 KB Created: 2021-07-02 07:01:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a3bde963014f784904de0afcebd73b3e SHA-1: e24a5ebedb1373555b65ecdf8ce15a4c037123e6 SHA-256: df6e3fe74397488cd7a46c5cf6e6de15ddc9dc173815fa85e99e5adda5074c1a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link to a redirector URL, advertised as a 'game hack'. This link, http://netcdn.co/app/431946152/how-to-hack-through-walls-on-roblox-2021-game-hack, is flagged as malicious. The document's content and the heuristic firings strongly suggest a phishing or scam attempt designed to lead the user to potentially harmful content or further malicious downloads.

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.co/app/431946152/how-to-hack-through-walls-on-roblox-2021-game-hack In PDF document text
    • https://esl.hess.com.tw/image/data/files/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/free-draw-roblox_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/collect-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/coin-master-latest-version-hack_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/minecraft-pe-hack-client-2021_GM479516143.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/ww-roblox-come_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/free-tiktok-followers-no-survey_GM835599320.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/how-to-hack-stats-on-a-roblox-game_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/how-ti-get-free-clothes-with-no-robux_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/coin-master-free-spin-link-app_GM406889139.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_off00002d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D83 22368 bytes
SHA-256: 7f917067fc09120860b4ecc16aed971b80254c7030ba19646e5a6307c094edb6
font_01_sfnt_off00005f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F25 19724 bytes
SHA-256: b7b32dbadc4d930faf5fec10a9224990e1c4b678d48a7f31415d948c7c2cffb4

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