Malicious PDF — malware analysis report

Static analysis result for SHA-256 575c95a8b8dbf837…

MALICIOUS

PDF

41.9 KB Created: 2021-05-14 09:00:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7859f1c1a2f9393a4cbf115047fc48ef SHA-1: bad1d8e775968b94b170cd6b6e89f52280fefbe0 SHA-256: 575c95a8b8dbf837280e8589e5d74f0d6f7438cbc0c86ee6d0b8517a7e8e5585
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free currency to entice users. It contains a large number of external links, many pointing to PDF files hosted on brokermortgages.com, suggesting a link farm or SEO manipulation tactic. The primary URL, https://netcdn.xyz/app/406889139/free-coins-coin-master-hack-game-hack, is likely a redirector to malicious content or a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/free-coins-coin-master-hack-game-hack PDF link annotation
    • http://brokermortgages.com/images/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/coin-master-free-spins-2021-generator_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://brokermortgages.com/images/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/hack-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/free-robux-app_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/easy-robux-com_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/coin-master-hack-apk-2021-ios_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/free-minecraft-games-for-kids_GM479516143.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_off00004b62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B62 24672 bytes
SHA-256: 296addf6a4589349fdc5de74bf3ae065c75a3dafbfe428a8602cadfa1cec6e01
font_01_sfnt_off000082ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82BA 17880 bytes
SHA-256: d4b290fbe96f806a63e53895600235ad07ee700a50234ed47d5e5eeda0b1e0de

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