Malicious PDF — malware analysis report

Static analysis result for SHA-256 406dca9e8d807093…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 01:04:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 40ce9dc15bd5a3bcad2f4c8046819f0b SHA-1: ca4ef9e75cf420bf4980bdd38e5a60d86e6ab834 SHA-256: 406dca9e8d8070932d65e0da55c6c14720de9cc3bf83da98a0703b6aa34da51f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-risk heuristic firing for a game hack redirect lure, pointing to a suspicious URL. The document body also contains this URL, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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/free-spins-for-coin-master-game-game-hack PDF link annotation
    • https://www.moledigital.co.uk/uploads/files/files/how-to-hack-roblox-to-get-admin-2021_GM431946152.pdfIn PDF document text
    • https://www.moledigital.co.uk/uploads/files/files/can-you-give-me-robux_GM431946152.pdfIn PDF document text
    • https://www.moledigital.co.uk/uploads/files/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • https://www.moledigital.co.uk/uploads/files/files/wwwcoin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • https://www.moledigital.co.uk/uploads/files/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.moledigital.co.uk/uploads/files/files/roblox-wall-hacks-for-mac_GM431946152.pdfIn PDF document text
    • https://www.moledigital.co.uk/uploads/files/files/fb-coin-master_GM406889139.pdfIn PDF document text
    • https://www.moledigital.co.uk/uploads/files/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.moledigital.co.uk/uploads/files/files/coin-master-villages_GM406889139.pdfIn PDF document text
    • https://www.moledigital.co.uk/uploads/files/files/best-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://www.moledigital.co.uk/uploads/files/files/roblox-free-tycoon_GM431946152.pdfIn PDF document text
    • https://www.moledigital.co.uk/uploads/files/files/free-coins-coin-master-link-today_GM406889139.pdfIn PDF document text
    • https://www.moledigital.co.uk/uploads/files/files/roblox-dress-free_GM431946152.pdfIn PDF document text
    • https://www.moledigital.co.uk/uploads/files/files/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • https://www.moledigital.co.uk/uploads/files/files/slurp-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.moledigital.co.uk/uploads/files/files/roblox-rules_GM431946152.pdfIn PDF document text
    • https://www.moledigital.co.uk/uploads/files/files/robux-gratis-2021-hack_GM431946152.pdfIn PDF document text
    • https://www.moledigital.co.uk/uploads/files/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://www.moledigital.co.uk/uploads/files/files/how-to-hack-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • https://www.moledigital.co.uk/uploads/files/files/20-free-spin-link-coin-master_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
stream_002_off00003142.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3142 22912 bytes
SHA-256: a0856e7b31ded48a95e2bdc0f9ad4ce27bdee0649d92b90fe9e4fb1267d68987
font_01_sfnt_off000064c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C0 18432 bytes
SHA-256: ba2b1c803cf60430fecd3a4ea667911e0c566277fb0db9da711a2662cfde09a8