Malicious PDF — malware analysis report

Static analysis result for SHA-256 6feaa83e8fcd9bf1…

MALICIOUS

PDF

44.0 KB Created: 2021-05-19 01:39:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e40954618eed55fc1f58ad922fecd975 SHA-1: 02841b740744187543b2b21045af380049e73512 SHA-256: 6feaa83e8fcd9bf188cae6701400376dfdada7f4ab640f6ba90c3b3cb6f247ea
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 0.9969

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 https://netcdn.xyz/app/406889139/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack-game-hack PDF link annotation
    • https://vierabyragazze.com/upload/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-game-hacks_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/cm-spin-link_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/cheats-coin-master-free_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/wurst_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-70-spin-link-2021_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-make-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-games-coin-master_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/sites-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-codes-generator-no-verification_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
stream_003_off00004c33.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C33 25992 bytes
SHA-256: 49d46a2c2cc4f8b08db39911a3ab6aaf7d7574f5901f3d5ef328ec0ae1acc90f
font_01_sfnt_off000087b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87B3 18908 bytes
SHA-256: 22eea22e93e3a2ab8e7a2e6bfe46b3c4bbbdffc0ed3854b3ba75aeac54633c45

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