Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6cfbc30e46ef849…

MALICIOUS

PDF

32.7 KB Created: 2021-07-21 09:02:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b6b9c27d836fc29e0ec5d61576ec04d1 SHA-1: 1cb242ccd757af5da29e04573928de384dba29bc SHA-256: b6cfbc30e46ef849e74bd02f700176ad4de6ddff04a94c5db6359a84dd97bf30
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/835599320/free-tiktok-likes-and-followers-game-hack PDF link annotation
    • https://sistemconveior.ro/wp-content/uploads/fsqm-files/free-robux_GM431946152.pdfIn PDF document text
    • https://sistemconveior.ro/wp-content/uploads/fsqm-files/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • https://sistemconveior.ro/wp-content/uploads/fsqm-files/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • https://sistemconveior.ro/wp-content/uploads/fsqm-files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://sistemconveior.ro/wp-content/uploads/fsqm-files/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://sistemconveior.ro/wp-content/uploads/fsqm-files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://sistemconveior.ro/wp-content/uploads/fsqm-files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://sistemconveior.ro/wp-content/uploads/fsqm-files/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://sistemconveior.ro/wp-content/uploads/fsqm-files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://sistemconveior.ro/wp-content/uploads/fsqm-files/coin-master-free-spin-today_GM406889139.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_off00002d89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D89 22432 bytes
SHA-256: 2bb1e43ebe4474d8c1a7da9a7943aa0b1c357e23c398cb15ad2f928f36ab141c
font_01_sfnt_off00005f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F23 17868 bytes
SHA-256: d80a5b590fc1f536f9a9d288da246cac59e10184b672ed9828d0991e5480315e

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