Malicious PDF — malware analysis report

Static analysis result for SHA-256 6253b46ad0cfc3c0…

MALICIOUS

PDF

43.5 KB Created: 2021-05-17 11:17:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ea91aa49c8bc633bcb05583928806168 SHA-1: 6d4065bbe047621d3736ef02ed8fe4d2d4acf32d SHA-256: 6253b46ad0cfc3c092058772e30ea873cb5e7b5da10c6e1dd558cc8b24e43976
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 0.9648

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/479516143/free-pe-game-hack PDF link annotation
    • http://brinicombe.co.uk/images/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/coin-free-master_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/robuxy-com-generator_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://brinicombe.co.uk/images/coin-master-free-spins-hacktman_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/robux-2021_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://freegiftcodes.euIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000046e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46E4 25172 bytes
SHA-256: 7be397c11bf84fbf487b406a605110660bd2123de4ef5517b50200322beda55c
font_01_sfnt_off000080e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80E1 2840 bytes
SHA-256: 787e0768241fb57660bcc9c7f726cf687277c463cdf8c586c4782ee9d03c3606
font_02_sfnt_off00008aa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA0 17268 bytes
SHA-256: 46433faf3b0be28078b79d1b2528f0e9142f520200f3a4c57f2027421dc25ed5

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