Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbd780f44c320adc…

MALICIOUS

PDF

40.9 KB Created: 2021-05-01 16:15:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 861d1cb67d21245971649416082ab87f SHA-1: 07cff4ce3fbe5d39fa3b677dc3763ec830f406e6 SHA-256: cbd780f44c320adc65066930606b3a5b123bc6937ac5230e2f6016cd51452104
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 0.9941

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/431946152/las-mejores-paginas-de-hacks-de-roblox-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/roblox-free-sonic.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/brick-cars-roblox-cheat-codes.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/hack-on-roblox-free-robux.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-forcefield-hack.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/freemoblie24info-free-robux.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/iron-man-simulator-roblox-war-machines-hack-lua-c-script.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/to-cash-free-robux.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/legit-free-robux-generator.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/youtube-roblox-robux-hack-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/hack-on-roblox-free-money-vircle-simulator.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_off0000401f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x401F 26296 bytes
SHA-256: bfd8dbd385d59d284db283d469d996d1cbdf52636a483c21ee98dcf1d100e911
font_01_sfnt_off00007aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AEF 19296 bytes
SHA-256: 425608115fd5b7165253b2b0c83f64f24abb07f8fc5de2ca6e7c086a9f82516e

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