Malicious PDF — malware analysis report

Static analysis result for SHA-256 8efef81d870995fb…

MALICIOUS

PDF

35.2 KB Created: 2021-07-01 13:07:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1a2d02c6f96f367d4e9fa8d0276449db SHA-1: 1167b0d6c53aa1f6c34f82f51f4defd20fe8fa85 SHA-256: 8efef81d870995fbde889a3e5e70082789a81ba1bbf31c726685ad65bf715a02
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/descargar-hack-para-roblox-2021-game-hack PDF link annotation
    • http://pustakafpsi.uin-suska.ac.id/repository/how-to-get-free-robux-glitch-easy_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/minecraft-mod-menu_GM479516143.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/hacks-roblox-funcinan_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/free-roblox-account-gettet_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/how-to-get-free-robux-with-bloxawards_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/fames-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/hacks-for-sale-in-roblox_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/free-robux-2021-unlimited-codes-for-kids_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/how-to-download-free-roblox_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/get-free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/roblox-hack-scripts-for-children_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/hack-what-always-works-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/free-robux-cards-that-works_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off000033e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33E9 21720 bytes
SHA-256: 1eab46c74e3027c6cd2a333e05e193d9c6b8fb7b93389118c4a8afaa07753462
font_01_sfnt_off00006382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6382 19380 bytes
SHA-256: 13db15de528ba9d9b86f503a2ea82266a6566a25a6fc499c60a51294bbdfc23f

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