Malicious PDF — malware analysis report

Static analysis result for SHA-256 343b3e345f5e9fbf…

MALICIOUS

PDF

47.1 KB Created: 2021-06-10 14:51:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 920f7fb8ab7bfb4c969a8994cfc48ba6 SHA-1: d59d2611aec00b8ce52fb3602424b2c08b45471e SHA-256: 343b3e345f5e9fbf351617a78671deff56ca729234679b153571cc3f76208e89
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'free generator / game hack' lures. The document body, though partially corrupted, contains references to 'Roblox Hacks' and a primary malicious URL. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.tw/app/431946152/hcbb-roblox-hacks-game-hack In PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/freerobuxexe_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/how-to-get-free-robux-no-clickbait-2021-add_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/cheat-roblox-mod-de-passe_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/how-to-get-free-broken-egg-in-roblox-rpg-world_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/promo-code-hack-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/roblox-free-avatar-editor_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/robux-script-hack-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/roblox-sans-shirt-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/free-green-bird-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/jailbreak-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/cheats-for-robux-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E91 25560 bytes
SHA-256: e4118b0b288d45c98219570a8fe3b6f6d83a44886b08f45bbd613af15c39c11e
font_01_sfnt_off000089c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89C2 3512 bytes
SHA-256: d2fbe445e4228ea2e3d75d3e8f0f84124f9dd8d3d0cf2c6e4e63bcca92f2519f
font_02_sfnt_off00009556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9556 18184 bytes
SHA-256: 9455694526d3b86eb386f77266408245119aa099cbf14da323f3a7c61249486f

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