Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fe6ae51392a83af…

MALICIOUS

PDF

46.7 KB Created: 2021-05-17 19:36:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8ed1ef9c44f06e7c933257bacd4a8f56 SHA-1: ab1056160fb59cf6661cd6d8995623c10ce3e786 SHA-256: 8fe6ae51392a83af4a99405bbb25edc8bec57415fc70b20f6f8f5036814f90fa
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 0.8948

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-hack-no-human-verification-2021-game-hack PDF link annotation
    • http://www.africanearthgroup.com/uploads/files/files/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/village-3-coin-master_GM406889139.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/hack-robux_GM431946152.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/how-to-get-a-refund-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/coin-master-free-online-game_GM406889139.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/free-robux-working_GM431946152.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/how-can-you-get-free-robux_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
stream_003_off00004b5a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B5A 27392 bytes
SHA-256: e15fcbceb787d46bf4beffbb96aa1a6eca0e9a9f57d5efb90430a4ac3ab4085a
font_01_sfnt_off00008918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8918 2812 bytes
SHA-256: fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f
font_02_sfnt_off000092b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92B9 18652 bytes
SHA-256: a8ac93ce14fdca52a5b6c8b5e666cce4eecb8a0a07e33e24ccf8b934d9dd8f42

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