Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fb8b4e1cab7f8fb…

MALICIOUS

PDF

34.3 KB Created: 2021-06-28 12:54:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: de4e4aa3ee4677c9febb4a4215ebbcf8 SHA-1: 2268ddbce97b50b54d24fba474369ab4c45975c6 SHA-256: 8fb8b4e1cab7f8fb94fa45cddab87c2b26d0910dfeee1f318bfe3d5ec0e6ef80
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 0.9980

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 http://netcdn.co/app/431946152/roblox-robux-hack-generator-no-survey-2021-game-hack PDF link annotation
    • https://lms.mabbaca.com/__statics/gudangsoal/files/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://lms.mabbaca.com/__statics/gudangsoal/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://lms.mabbaca.com/__statics/gudangsoal/files/robux-sites_GM431946152.pdfIn PDF document text
    • https://lms.mabbaca.com/__statics/gudangsoal/files/coin-master-free-spin-and-trading-group_GM406889139.pdfIn PDF document text
    • https://lms.mabbaca.com/__statics/gudangsoal/files/www-coinmaster-com_GM406889139.pdfIn PDF document text
    • https://lms.mabbaca.com/__statics/gudangsoal/files/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://lms.mabbaca.com/__statics/gudangsoal/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • https://lms.mabbaca.com/__statics/gudangsoal/files/account-in-roblox-free_GM431946152.pdfIn PDF document text
    • https://lms.mabbaca.com/__statics/gudangsoal/files/coin-master-exchange-40-free-spins_GM406889139.pdfIn PDF document text
    • https://lms.mabbaca.com/__statics/gudangsoal/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lms.mabbaca.com/__statics/gudangsoal/files/113-hacked-client_GM479516143.pdfIn PDF document text
    • https://lms.mabbaca.com/__statics/gudangsoal/files/coin-master-free-stars_GM406889139.pdfIn PDF document text
    • https://lms.mabbaca.com/__statics/gudangsoal/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • https://lms.mabbaca.com/__statics/gudangsoal/files/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • https://lms.mabbaca.com/__statics/gudangsoal/files/minecraft-packs-free_GM479516143.pdfIn PDF document text
    • https://lms.mabbaca.com/__statics/gudangsoal/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://lms.mabbaca.com/__statics/gudangsoal/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://lms.mabbaca.com/__statics/gudangsoal/files/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • https://lms.mabbaca.com/__statics/gudangsoal/files/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://lms.mabbaca.com/__statics/gudangsoal/files/best-free-buildings-in-roblox-studio_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
font_00_sfnt_off0000300f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300F 21564 bytes
SHA-256: f123dacca0b934c35770c548d7fe0ae1560a603363807a0456de51eb7dbcd06c
font_01_sfnt_off00005f43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F43 19596 bytes
SHA-256: 8c7b484b7b9e0ea08826172437e51906e72a4701ac7e1ff47c5fb42f152bf684

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