Malicious PDF — malware analysis report

Static analysis result for SHA-256 59e8f20b49f030d6…

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 10:17:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0b3f5da9a8f02b8bb019318ef2de963f SHA-1: c75234d3098eb673a725c9d561ce0271c7f998d1 SHA-256: 59e8f20b49f030d64fdb357d484504d5e418d5f33136a1aaac022fbd06e9b1bf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising free in-game currency and hacks for popular games like Robux and Coin Master. The heuristic firings confirm the presence of malicious redirector links and a lure designed to entice users. No scripts were extracted, but the document's primary function appears to be directing users to potentially harmful websites.

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/free-robux-2021-no-verification-game-hack In PDF document text
    • https://encounternepal.com/userfiles/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coinmasterfreespinlink_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-spins-and-coins-from-coin-master-game_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-34-4-hack-download_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-levels_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/avatar-the-last-airbender-roblox_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-free-pin_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-roblox-card_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-game-free-spin-download_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/minecraft-linux-free_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/robux-gift-card-codes-free-2021_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/lots-of-robux_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/good-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-event-hack_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-script-executor-roblox-2021-no-virus-no-danger_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_off00002f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F51 21572 bytes
SHA-256: af865cf4dd94cba0af1bb8cd5f422c87e2369eb45f30ac7a730d6522ddbc8656
font_01_sfnt_off00005ea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA9 19476 bytes
SHA-256: 55ad41a6ce49086aa15382541082a2b64ef707ba2ed30a01096caf72f6ded3f0

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