Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7f800667ef9fdbe…

MALICIOUS

PDF

43.0 KB Created: 2021-05-14 22:01:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8d05537a5ba83bcf22681535b29de3cc SHA-1: a06033713ad25b682ce5ccf4f55a52585382a8e6 SHA-256: a7f800667ef9fdbec833d30fd0fc0b7232d3e76673665eab189a094e6bc6d6f0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to websites promising game hacks and free currency, a common lure for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure itself contains actionable links, suggesting it's designed to lead the user to a malicious site, likely for credential harvesting or further payload delivery.

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/free-spins-coin-master-daily-game-hack PDF link annotation
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/hack-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/hack-coin-master-using-pc_GM406889139.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/coin-master-generator-hack_GM406889139.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/free-hair-roblox-boy_GM431946152.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/get-free-robux-info_GM431946152.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/coin-master-hack-program_GM406889139.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/como-hackear-coin-master-2021_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_off00004c2c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C2C 25008 bytes
SHA-256: 43e28abf3cfab54c8e857a13cff15db2861aa564db3569056da805923ccf1fb4
font_01_sfnt_off000085ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85AC 18308 bytes
SHA-256: 148513adc370bd80d4aa437ff839b9fedc0d32c70a1f1942828a2071191e315e

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