Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e63a0b7f005cd54…

MALICIOUS

PDF

35.2 KB Created: 2021-07-08 18:48:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9c3203b53396318d75033bf09d566480 SHA-1: eed5ec744fbf9ad3f05cc7b01a7f4cd5ff48e85c SHA-256: 6e63a0b7f005cd548a1f2579a7bd4f8ca1092abd7f21198a9760cd74e5eab0ad
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains embedded URLs and a heuristic firing for PDF_URI, indicating an attempt to direct users to external resources. The document body and extracted URLs suggest a lure for game hacks and cheats, such as 'wurst-client-game-hack'. The ML classifier also flagged this PDF as malicious, increasing confidence in its suspicious nature.

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/479516143/wurst-client-game-hack In PDF document text
    • https://encounternepal.com/userfiles/files/www-free-robux-com_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/roblox-apocalypse-rising-cheats-2021_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-roebucks_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/hack-de-robux-2021-mayo_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-mast-hacks_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free4mobile-info-roblox-hack_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/rewards-robux_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-free-spin-now_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_off000033b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33B9 22928 bytes
SHA-256: 267257f43b75990b284162b5b2b37471af7b2a5f65ca5efbea6afc64c34f6ac4
font_01_sfnt_off0000674b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x674B 18268 bytes
SHA-256: 2412ed9a3ceb2eea26d296ef98a0637bbee5e1d0f7918c2b5d1477ee9abc40e8

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