Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dbb50b21f3dc0c8…

MALICIOUS

PDF

46.9 KB Created: 2021-06-10 20:28:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6d335e4a0f1c49c217a8c22055ef0d20 SHA-1: 31404fb936ad1b2daea3a467b6ec58df66da2d9e SHA-256: 6dbb50b21f3dc0c848b5f7932222bd2a0591e9e020839cf5f20e445c33dcfd85
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains links to known malicious redirectors, specifically promoting 'free generator' and 'game hack' lures. The document body, though heavily obfuscated, contains references to these lures and embedded URLs. The primary function appears to be redirecting users to potentially harmful websites.

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/how-to-make-a-free-robux-generator-game-hack In PDF document text
    • https://registracomodo.it/wp-content/uploads/fsqm-files/get-money-roblox-free_GM431946152.pdfIn PDF document text
    • https://registracomodo.it/wp-content/uploads/fsqm-files/how-to-find-a-hacked-server-on-roblox_GM431946152.pdfIn PDF document text
    • https://registracomodo.it/wp-content/uploads/fsqm-files/roblox-free-robux-hack-pastebin_GM431946152.pdfIn PDF document text
    • https://registracomodo.it/wp-content/uploads/fsqm-files/roblox-new-hack_GM431946152.pdfIn PDF document text
    • https://registracomodo.it/wp-content/uploads/fsqm-files/free-robux-roblox-legaly_GM431946152.pdfIn PDF document text
    • https://registracomodo.it/wp-content/uploads/fsqm-files/inspect-roblox-hack_GM431946152.pdfIn PDF document text
    • https://registracomodo.it/wp-content/uploads/fsqm-files/tiktok-likes-free_GM835599320.pdfIn PDF document text
    • https://registracomodo.it/wp-content/uploads/fsqm-files/how-to-get-robux-free-2021_GM431946152.pdfIn PDF document text
    • https://registracomodo.it/wp-content/uploads/fsqm-files/lohith-gaming-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://registracomodo.it/wp-content/uploads/fsqm-files/free-roblox-game-pass_GM431946152.pdfIn PDF document text
    • https://registracomodo.it/wp-content/uploads/fsqm-files/hacker-simulator-roblox-code_GM431946152.pdfIn PDF document text
    • https://registracomodo.it/wp-content/uploads/fsqm-files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://registracomodo.it/wp-content/uploads/fsqm-files/how-to-get-free-weapons-in-roblox_GM431946152.pdfIn PDF document text
    • https://registracomodo.it/wp-content/uploads/fsqm-files/roblox-booga-booga-mojo-hack_GM431946152.pdfIn PDF document text
    • https://registracomodo.it/wp-content/uploads/fsqm-files/roblox-cheats-for-laptop_GM431946152.pdfIn PDF document text
    • https://registracomodo.it/wp-content/uploads/fsqm-files/arcane-adventures-roblox-free_GM431946152.pdfIn PDF document text
    • https://registracomodo.it/wp-content/uploads/fsqm-files/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://registracomodo.it/wp-content/uploads/fsqm-files/roblox-teleport-hack-jailbreak_GM431946152.pdfIn PDF document text
    • https://registracomodo.it/wp-content/uploads/fsqm-files/roblox-cbro-aimbot-hack_GM431946152.pdfIn PDF document text
    • https://registracomodo.it/wp-content/uploads/fsqm-files/roblox-jailbreak-hack-application-easy_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
stream_004_off00004eab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EAB 24992 bytes
SHA-256: ad2b212b82a2ff8f58b4434ed980a5f6d35dc8487356ebda05492d5fd3737d0c
font_01_sfnt_off000088e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88E2 2852 bytes
SHA-256: e9630f3bb738ae3bc329a423cf069c8035d70ce2227e3557c42815f85ad3284f
font_02_sfnt_off000092a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92A4 18876 bytes
SHA-256: 8b06ede797fbaf1ac517b0dd08d710a627a45b75f502e35d189202ca4ce06ecc

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