Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f1ef3a8d2ac30a8…

MALICIOUS

PDF

41.3 KB Created: 2021-05-19 02:34:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: cafab3718bbc216aad54f5e8161f95cb SHA-1: af544cd8598b01f7a39fd0b996b2567da60d8022 SHA-256: 6f1ef3a8d2ac30a804c402c75de5e4da7dcd9688dc00ee3c8681010423b84196
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple external URLs, including one specifically identified as a 'free generator / game hack' lure. The ML classifier strongly flagged this PDF as malicious, and the presence of these lures suggests an attempt to trick users into visiting potentially harmful sites. No scripts were extracted, but the document's structure and embedded URLs indicate a phishing or malware distribution attempt.

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-codes-game-hack PDF link annotation
    • https://www.deg91.com/upload/files/minecraft-sign-up-free_GM479516143.pdfIn PDF document text
    • https://www.deg91.com/upload/files/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://www.deg91.com/upload/files/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • https://www.deg91.com/upload/files/8bp-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.deg91.com/upload/files/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • https://www.deg91.com/upload/files/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.deg91.com/upload/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://www.deg91.com/upload/files/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • https://www.deg91.com/upload/files/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • https://www.deg91.com/upload/files/roblox-premium-free_GM431946152.pdfIn PDF document text
    • https://www.deg91.com/upload/files/free-daily-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://www.deg91.com/upload/files/minecraft-pe_GM479516143.pdfIn PDF document text
    • https://www.deg91.com/upload/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • https://www.deg91.com/upload/files/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdfIn PDF document text
    • https://www.deg91.com/upload/files/free-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.deg91.com/upload/files/how-to-get-free-roblox-items_GM431946152.pdfIn PDF document text
    • https://www.deg91.com/upload/files/how-to-get-free-likes-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://www.deg91.com/upload/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://www.deg91.com/upload/files/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • https://www.deg91.com/upload/files/wurst-112-2_GM479516143.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_off00004920.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4920 24408 bytes
SHA-256: 19db5dfeed36ec992fe19b11aaf48a8805b2b9b119447de39092bd9e7aebb582
font_01_sfnt_off00008099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8099 17720 bytes
SHA-256: e3dc30cd69473f08b9483bb660e9aeaccc8f6f74c3e4f353697525059d592d8d

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