Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f8333e77acbf115…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 08:20:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0d35ce7960fafaccbdf5b9b02594118b SHA-1: eafb06d403e53eb0757219941926881320e9361a SHA-256: 4f8333e77acbf115b95b5a14925ccff4bd5a9375c8850b8947317c066c4bf35b
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.tw/app/406889139/cm-free-spins-and-coins-game-hack PDF link annotation
    • http://educhina.mn/editor/files/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/robux-sites_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/how-to-get-any-hat-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-robux-without-human-verification-and-survey_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/roblox-scripters-for-free_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/file-droper-roblox-hack_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/how-to-get-builders-club-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-spin-link_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/fast-robux-online_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-hack-pc-download_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-free-spins-daily-link-game-mod_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-coin-master-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-2021-free-spins-link_GM406889139.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_off000031bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31BB 22500 bytes
SHA-256: 53bada5226fda93deb4c2faacd3165903f381f0651e151cfbf48478f3c8f8cf8
font_01_sfnt_off000063dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63DC 18504 bytes
SHA-256: f00e367a31c85233a34fe06f38eb2d2f9e8b3c3dd7aa4d90529679d1f195e915

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