Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd035db26e585dee…

MALICIOUS

PDF

41.8 KB Created: 2021-05-11 18:46:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8fba53f548e72bacb15c1d56d2dc5c00 SHA-1: 1b1c5d0e84963c213d2d82444f0a57d038de160b SHA-256: cd035db26e585deeef922282ccec0fbf8d1d050c0a0d190489d4d114ac8c07c3
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links disguised as game hacks and generators, aiming to lure users to malicious websites. The ML classifier strongly indicated maliciousness, and the embedded URLs suggest a phishing or malware distribution attempt. No scripts were extracted, but the document's structure and content point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/431946152/roblox-hack-game-game-hack PDF link annotation
    • http://bemviverclin.com.br/images/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-free-spins-and-chips_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-pro-hack_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-free-stars_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-game-free-spin-download_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-daily-spin-link_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-promo-codes-for-robux_GM431946152.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_off00004731.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4731 25076 bytes
SHA-256: 8bf68346162e4fbdfa6c7164f358695575c5ac256b0c30115b019408f4cb6ef8
font_01_sfnt_off00008091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8091 18440 bytes
SHA-256: ebafd2a9612b8145e5e0fd0fae0a522d36691e15007df27d7d415ea6fce26a90

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