Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b5950e1be506987…

MALICIOUS

PDF

35.9 KB Created: 2021-06-29 07:13:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 481a5b724a992288f0467bd04ed89056 SHA-1: 8860009aa9fe3612de4de7508b95e33e10567292 SHA-256: 7b5950e1be50698737151ae0722f6ccf146da1db1530c08b102ebaa3f83de0aa
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.co/app/431946152/how-to-speed-hack-on-roblox-2021-game-hack PDF link annotation
    • http://www.3d-gold.com.hk/upload/files/free-girl-hair-roblox_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-draw-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-roblox-girl-account_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-coin-spin-daily-link-coin-master_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-spins-coin-master-march-2021_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/are-pubg-uc-available_GM1330123889.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-roblox-gift-cards-that-can-be-used-unlimited-times_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/robux-website-hack_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-free-online-game_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/prison-break-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/robux-win_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-get-shirts-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-2021-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/minecraft-hacks-ps4_GM479516143.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/speed-hack-roblox-app-engine-64-2021_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_off0000320a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x320A 22928 bytes
SHA-256: 329f882fee74c278be09f45c7803a2ca02ccb256a4e3ad194721b24aaf25bf73
font_01_sfnt_off00006550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6550 19572 bytes
SHA-256: e8ba28c0cbb448c7762769b2b52411e90fcee8e32b34877145846d23d65a2b38

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