Malicious PDF — malware analysis report

Static analysis result for SHA-256 496fa625b46860f9…

MALICIOUS

PDF

46.5 KB Created: 2021-05-14 19:13:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 417f9cfa51b5c8e90f7e8ee2e71bef67 SHA-1: 093299ef7db53cc98fecf9bc1e8d5e3ed8b98828 SHA-256: 496fa625b46860f95e042989e7667c8e7db75ecc8b8a0961058a2637ac67ed44
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are structured as SEO link farms for game-related hacks and cheats. The primary lure appears to be 'Coin Master' game hacks, with a high-confidence heuristic flagging it as a PDF SEO link farm. The document's structure and embedded URLs strongly suggest it is designed to redirect users to potentially malicious sites or scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/hack-coin-master-online-game-hack PDF link annotation
    • http://fmbompastor.com.br/images/coin-master-2021-free-spins-link_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-hack-tool-no-survey_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/hack-my-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-hacks-for-iphone_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-free-robux_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://fmbompastor.com.br/images/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-mast-hacks_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-free-spins-2021-app-download_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/how-to-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-vpn-for-minecraft_GM479516143.pdfIn PDF document text
    • http://fmbompastor.com.br/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-free-raid-link_GM406889139.pdfIn 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_off00004911.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4911 24196 bytes
SHA-256: afad0f1c8beeb9a138563ef54df53c9b2ba0c804050471177480de1abf918ded
font_01_sfnt_off0000804d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x804D 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_02_sfnt_off000094d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94D7 17788 bytes
SHA-256: e0e539ae1db8c03a1be4e251235a7cd5530d910df9e974361113a9fde74a9cf4

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