Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f59b83bbbdef1c6…

MALICIOUS

PDF

38.7 KB Created: 2021-05-23 07:33:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 90fd0df3ddf9e10c30ac1f0ce221dde2 SHA-1: 2fa974e0c704b4fcd769e0b6a139486d2c90bc3a SHA-256: 5f59b83bbbdef1c644b16161a852158731bb5f77d02d9630709051fbbd07f8bf
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 0.8060

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/479516143/free-minecraft-maps-game-hack PDF link annotation
    • http://mcdougalfamily.site/images/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://mcdougalfamily.site/images/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://mcdougalfamily.site/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://mcdougalfamily.site/images/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://mcdougalfamily.site/images/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3613 24428 bytes
SHA-256: d5f1c2d53b69301acecc3a2b695a115128764367636ac83201f86becc43426ba
font_01_sfnt_off00006d85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D85 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00007795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7795 17744 bytes
SHA-256: 642e76b92f67015eb87e7bb2f8978493590a3d76ebc6958dd5b149369a6bd5f2

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