Malicious PDF — malware analysis report

Static analysis result for SHA-256 c804b514ca3c26ff…

MALICIOUS

PDF

49.4 KB Created: 2021-06-08 13:04:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e1c1effd3b0bbb8fbf2862e35b6d186f SHA-1: 01901f03146ad7eadf241d6b10d4eb9d848a8287 SHA-256: c804b514ca3c26ff9d242f42c84cdba4d17f7f451fc74716ed28e5441f421a49
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to a "Roblox Free Robux Generator" lure. The document body confirms this lure and includes the malicious URL. This suggests the document is designed to trick users into visiting a potentially harmful website, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/roblox-free-robux-generator-2021-game-hack In PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/roblox-free-exploits-with-decompiler_GM431946152.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/roblox-cheat-2021-fr_GM431946152.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/roblox-cheats-pris_GM431946152.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/free-roblox-accounts-2021-september_GM431946152.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/hacks-for-roblox-the-mad-murderer_GM431946152.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/roblox-cookie-editor-hack_GM431946152.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/run-free-roblox-id_GM431946152.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/roblox-seven-deadly-sins-online-script-hack_GM431946152.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/how-to-look-aesthetic-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/daily-free-spins-coin-master_GM406889139.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_off00005661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5661 26264 bytes
SHA-256: a6c216715b499cfc03e91d29091c983604a91b0c873a4073e3111e439ea4a89a
font_01_sfnt_off000092cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92CB 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00009c7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C7D 18820 bytes
SHA-256: 5d2ead64db0ad31ca207c531fb8d23bcdb6cf67dcd84beac16e01571736fb436

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