Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfda35dcc32ccadc…

MALICIOUS

PDF

43.0 KB Created: 2021-05-17 10:32:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 314227687670d5bf75d3f8bc3cf37cea SHA-1: 4cf88074f99644f090beb4e11662587c10a7f115 SHA-256: cfda35dcc32ccadc0285099ee742a318c1d81d1a9e4d1f5003f0d008d49aeac2
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 0.9971

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/coin-master-free-spins-today-daily-links-game-hack PDF link annotation
    • http://www.mostraining.co.za/images/what-are-points-for-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.mostraining.co.za/images/i-need-robux_GM431946152.pdfIn PDF document text
    • http://www.mostraining.co.za/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.mostraining.co.za/images/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.mostraining.co.za/images/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://www.mostraining.co.za/images/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
    • http://www.mostraining.co.za/images/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://www.mostraining.co.za/images/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.mostraining.co.za/images/no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.mostraining.co.za/images/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://www.mostraining.co.za/images/how-to-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.mostraining.co.za/images/free-spin-appscoin-master_GM406889139.pdfIn PDF document text
    • http://www.mostraining.co.za/images/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://www.mostraining.co.za/images/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.mostraining.co.za/images/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.mostraining.co.za/images/instant-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.mostraining.co.za/images/coin-master-hack-that-actually-works_GM406889139.pdfIn PDF document text
    • http://www.mostraining.co.za/images/coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://www.mostraining.co.za/images/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • http://www.mostraining.co.za/images/roblox-com-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_003_off00004bf5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BF5 24676 bytes
SHA-256: 15ff4a732b47d2d3b615afee3d8243ac45d01bbfaf4781ddc7856be764b7bead
font_01_sfnt_off000084a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84A0 18652 bytes
SHA-256: 52d597ff4b9023df6b3510b92f87dc1d2329aed0448bc9fa59130058567cb992

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