Malicious PDF — malware analysis report

Static analysis result for SHA-256 313ee2daac2557b9…

MALICIOUS

PDF

33.3 KB Created: 2021-07-19 18:19:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: dd41568bc2f8b1012daa718f5f260342 SHA-1: d22a7fda2d7f2e5376790e49d67f0a1942917f14 SHA-256: 313ee2daac2557b93a023bfccaf49913bdcdc5503bd65a3a010e265317976240
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 0.9942

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.tw/app/431946152/free-robux-card-codes-game-hack PDF link annotation
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/earn-free-robux_GM431946152.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/hack-robux_GM431946152.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C88 22628 bytes
SHA-256: bfebed35ff6c52559eca761f027bb394391ed1716da255bd396ad22858ff9f93
font_01_sfnt_off00005efb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFB 18604 bytes
SHA-256: 76f154967b1764cdb0e080aec3bf58540dd9c05f424ffe6cf9398947fbdad8ca

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