Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf9c9a6dd1549cbc…

MALICIOUS

PDF

42.5 KB Created: 2021-05-17 08:26:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6eaac954589c2f62ba85bcb71a6bfcd4 SHA-1: aaec26b08f990e5bb507b8c448a1d0237137d34a SHA-256: bf9c9a6dd1549cbcc654a757de30af22d3da0c0c739ec0334a3b4a4ec0128626
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/get-free-spins-coin-master-game-hack PDF link annotation
    • http://www.vermaagri.com/uploaded_files/userfiles/files/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/coin-master-unlimited-spins-apk-free-download_GM406889139.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/robux-come_GM431946152.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/free-spins-coin-master-2021_GM406889139.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_off00004c57.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C57 24900 bytes
SHA-256: 48e66695aa18448e79507dde03ec7f2e3f3bbdcc517acb9a89137baea8e3444f
font_01_sfnt_off00008505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8505 17884 bytes
SHA-256: b0210710b9f532dde69bab3e54691bd54d84b0d7d990975f20826afd1ba27450

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