Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f4b88c9f31e1a32…

MALICIOUS

PDF

44.0 KB Created: 2021-05-10 19:00:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 2dcbdf9222d3e26e08e5c8bd0a66c3b1 SHA-1: 5ac9541e2027f35e2f9e14ed400ad7d8dd0ca6ea SHA-256: 0f4b88c9f31e1a32d32c2e62c0fad0bbacc7733286b562cbb69aca30082c2f97
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 0.9656

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/406889139/free-gold-cards-for-coin-master-game-hack PDF link annotation
    • http://vcelarskepotreby.org/images/coin-master-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/coin-master-35-2-hack_GM406889139.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/link-for-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/robux-free-online_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/coin-master-daily-free-spins-blog_GM406889139.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/free-draw-roblox_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/ios-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/roblox-avatar-free_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/free-links-for-coin-master_GM406889139.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
stream_003_off000045f7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45F7 26200 bytes
SHA-256: 8fbc96549ab9790b5287538a1893849f048399981164ba3b249ec1cf95ab8a7a
font_01_sfnt_off00008111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8111 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008ac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC2 17960 bytes
SHA-256: e7d6a33110c05f2f7358e31e331cf325c9b09bbae5ece44b659e3c4bfc76bc90

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