Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3288d1048e6b4f0…

MALICIOUS

PDF

41.6 KB Created: 2021-05-16 06:52:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e76e7fea0981bbe74f4ae00e4e21eac7 SHA-1: 212e94069c7a713e470864243e78162465bded0d SHA-256: c3288d1048e6b4f01ff7838323b7dab894d5ec9f07ac5c223567569414aed62d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/get-free-coin-master-game-hack PDF link annotation
    • http://bilhetim.com.br/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://bilhetim.com.br/images/coin-master-32-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://bilhetim.com.br/images/real-working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://bilhetim.com.br/images/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://bilhetim.com.br/images/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://bilhetim.com.br/images/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://bilhetim.com.br/images/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://bilhetim.com.br/images/coin-master-online-free-spin_GM406889139.pdfIn PDF document text
    • http://bilhetim.com.br/images/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://bilhetim.com.br/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://bilhetim.com.br/images/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://bilhetim.com.br/images/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • http://bilhetim.com.br/images/coin-master-free-spins-link-download-free_GM406889139.pdfIn PDF document text
    • http://bilhetim.com.br/images/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://bilhetim.com.br/images/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://bilhetim.com.br/images/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://bilhetim.com.br/images/113-hacked-client_GM479516143.pdfIn PDF document text
    • http://bilhetim.com.br/images/coin-master-village-4_GM406889139.pdfIn PDF document text
    • http://bilhetim.com.br/images/free-mojang-account-with-minecraft_GM479516143.pdfIn PDF document text
    • http://bilhetim.com.br/images/free-robux-offers_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_off000048df.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48DF 24860 bytes
SHA-256: 072a37fd9a8c3bd9fbbc60920edbfc0dc0f162e6fa9203c85cb3514ff4f1027a
font_01_sfnt_off00008221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8221 17712 bytes
SHA-256: 21945d37724c890dd621455a00f6108c8bb3199d41d839a53701429653b6b663

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