Malicious PDF — malware analysis report

Static analysis result for SHA-256 59c6b5b1bb01ba1b…

MALICIOUS

PDF

34.9 KB Created: 2021-05-22 17:07:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0350ae3f907b1867fabbc2ec4c44a8cb SHA-1: 8808b15ad9c61cc141ee06d026e9fd0365920782 SHA-256: 59c6b5b1bb01ba1b40be48bfe25a4eb818d7e0ed4499da0920b9fd6325cb7e4f
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 0.9508

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/835599320/free-tiktok-followers-without-verification-game-hack PDF link annotation
    • http://ghknights.org/images/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
    • https://www.ghknights.org/images/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • https://www.ghknights.org/images/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://ghknights.org/images/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • https://www.ghknights.org/images/bloxpink-free-robux_GM431946152.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
stream_002_off00003004.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3004 23860 bytes
SHA-256: bff15d8e0f40fd6bdfb00e97b2cfd224a50c5e82bab1245200f9144e8c8afd70
font_01_sfnt_off00006640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6640 18560 bytes
SHA-256: 4328f2d9021fda272d6942102c30ad90396447c40598e55ae21b07e1aa723a10

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