Malicious PDF — malware analysis report

Static analysis result for SHA-256 fafdd321f6725531…

MALICIOUS

PDF

41.0 KB Created: 2021-05-17 17:32:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4135c5c38a98365c09d2d367cd7e5f29 SHA-1: d129116b790450c1e6738d05ea126b904ab632b3 SHA-256: fafdd321f67255316687054bfb33d9c83109c1186f91ec1454fc5b260db3d20e
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/431946152/free-robux-2021-no-human-verification-game-hack PDF link annotation
    • http://gavertrimmers.be/images/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://gavertrimmers.be/images/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://gavertrimmers.be/images/roblox-games-to-play-for-free_GM431946152.pdfIn PDF document text
    • http://gavertrimmers.be/images/coin-master-homepage_GM406889139.pdfIn PDF document text
    • http://gavertrimmers.be/images/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://gavertrimmers.be/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://gavertrimmers.be/images/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://gavertrimmers.be/images/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://gavertrimmers.be/images/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • http://gavertrimmers.be/images/roblox-robux_GM431946152.pdfIn PDF document text
    • http://gavertrimmers.be/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://gavertrimmers.be/images/coin-master-free-stuff-links_GM406889139.pdfIn PDF document text
    • http://gavertrimmers.be/images/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://gavertrimmers.be/images/roblox-online-free_GM431946152.pdfIn PDF document text
    • http://gavertrimmers.be/images/roblox-rules_GM431946152.pdfIn PDF document text
    • http://gavertrimmers.be/images/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://gavertrimmers.be/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gavertrimmers.be/images/coin-master-hack-version-download-ios_GM406889139.pdfIn PDF document text
    • http://gavertrimmers.be/images/coin-master-code-for-free-spins_GM406889139.pdfIn PDF document text
    • http://gavertrimmers.be/images/free-robux-redeem-codes_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_off000042a7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x42A7 24392 bytes
SHA-256: 354c6f0f1c600e6db257907e5de8e5d770a76001651b385d90f96bf49c756a94
font_01_sfnt_off00007a91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A91 19260 bytes
SHA-256: a5b009a33d06eb91b5687aca452054299973906144ac3f9b2fc2dd0e2fef1dac

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