Malicious PDF — malware analysis report

Static analysis result for SHA-256 04de235fba42a604…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 07:11:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 09888c2c27300a5f29bacdf07047a94e SHA-1: d284dcca4a8da833d60644d7c1ca26a7319b5809 SHA-256: 04de235fba42a60431d8d4042b45104354dabe2bd345157fbefaedb326e6b24b
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded URLs, with a primary focus on a redirector URL that promises free game items. The document body and heuristic firings indicate a lure designed to entice users to click on links, likely leading to further malicious content or downloads. The presence of multiple redirector links and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/free-minecraft-capes-no-mods-game-hack In PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/dominus-hats-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/roblox-hackers-list_GM431946152.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/how-to-get-free-robux-in-roblox-pc_GM431946152.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/roblox-buiders-club-free_GM431946152.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/how-to-get-roblox-for-free-on-xbox-one_GM431946152.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/tiktok-follower-bot-free_GM835599320.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/roblox-free-draw-alpha-2_GM431946152.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/coin-master-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/how-to-hack-a-player-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/what-cheats-can-you-do-to-get-robux-fast_GM431946152.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/hack-coin-master-apk-358_GM406889139.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/tp-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/how-to-get-free-robux-2021-not-patched_GM431946152.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/generator-robux_GM431946152.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/roblox-free-hats-codes_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_off0000314d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x314D 22492 bytes
SHA-256: 1ca52735447a1666f6b31e83095546b68ebfbedecf000746d3abe62f8848a8b5
font_01_sfnt_off0000635b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x635B 18348 bytes
SHA-256: d7387eba205e2dc7011e0cc9c38cfc2261d39171642b1e4f0220b34e91761172

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