Malicious PDF — malware analysis report

Static analysis result for SHA-256 233a5db5b1b5ff24…

MALICIOUS

PDF

37.7 KB Created: 2021-05-21 07:06:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e883862e71bda46add7564cda1b31606 SHA-1: 86111247cc2eb57148651dfa15d99f1d694cfede SHA-256: 233a5db5b1b5ff2417243c9920efa523082b0513d4732ea8ef15ef94dbfafb45
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 0.9447

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/free-robux-com-no-verification-game-hack PDF link annotation
    • https://ibelive.com.tw/image/data/files/coin-master-hack-version-download_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/coin-master-hack-ios-without-verification_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://direct-link.netIn 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
stream_002_off00003251.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3251 26416 bytes
SHA-256: 89573d98179d66d2dc2260fd0b9480caf9bcb9f5b190cac9c27cf38275fb04db
font_01_sfnt_off00007047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7047 18860 bytes
SHA-256: fd9d837b898dacd9f5ea22edfb03c528ade61200bf0a18b53858ad02fb024854

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