Malicious PDF — malware analysis report

Static analysis result for SHA-256 e40bf681b54501fe…

MALICIOUS

PDF

43.1 KB Created: 2021-05-12 16:38:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 694c19e4469c446387682a2a0ebad35e SHA-1: 1794c9564b53f86e5ac10b1af4858d6c10360a4c SHA-256: e40bf681b54501fe514c25230293419e285458abff13249cc51fd0870d26f526
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a game hack redirector, specifically mentioning 'Coin Master Exchange 40 Free Spins'. The embedded URL, https://netcdn.xyz/app/406889139/coin-master-exchange-40-free-spins-game-hack, is the primary indicator of this lure. While no scripts were explicitly extracted, the PDF structure itself facilitates the redirection, aligning with T1566.001 (Spearphishing Attachment) as the likely initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/coin-master-exchange-40-free-spins-game-hack PDF link annotation
    • http://fmbompastor.com.br/images/free-vpn-for-minecraft_GM479516143.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-coin-hack_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-latest-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-free-100-spin_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-free-spins-link-without-human-verification_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • http://fmbompastor.com.br/images/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-mast-hacks_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/hack-coin-master-ios-download_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_003_off00004b7b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B7B 25248 bytes
SHA-256: 16fab61f49da7dc77df0fdc58c4cdcefa7ee4732a394fcc5a73f0a076c49f0bb
font_01_sfnt_off00008484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8484 18784 bytes
SHA-256: 02a21a8f4d043716a383ca2a996404ae5ffd223ec109726667024d192b61d1da

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