Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef6b45b633548e7f…

MALICIOUS

PDF

34.3 KB Created: 2021-07-10 02:53:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 03dec360a40d20725eb26a3d915935ad SHA-1: 22620ca788b0aae5b459027268e64b5c1dd8a26b SHA-256: ef6b45b633548e7f93b43860e9b38351789305bf15d53138230d65eb99fc380f
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 0.9980

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/406889139/fb-coin-master-free-spins-link-game-hack PDF link annotation
    • http://www.eucorro.com/arquivos/files/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/7-year-old-roblox_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-roblox-svg_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/how-to-hack-a-roblox-game-2021_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/how-to-hack-any-roblox-games-unlimited-health_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/how-to-make-a-roblox-item-free_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/www-coinmaster_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-tiktok-app_GM835599320.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/mobi-hack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/advhaa-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/robux-generator-com_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/roblox-prop-boat-free_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_off00003059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3059 22528 bytes
SHA-256: ab0f688e0f8c538b6b0cdfce46f86459246f341c9f7b6d0250bb4967305e721c
font_01_sfnt_off0000629d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x629D 18504 bytes
SHA-256: 4eacd226e81bffa6b4d713579153edb2c015fcb01c54d6f1ee3529ce8e6b5986

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