Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d728958c8cd84a9…

MALICIOUS

PDF

42.0 KB Created: 2021-05-14 03:04:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a664b54df4a3bd0a7c2cabb0a3f50345 SHA-1: e7ee7679ca65fb4f8a281914ff151fb0a8cfda82 SHA-256: 6d728958c8cd84a9305d6e7503c9504c73e1eab08a346b42457d17066f211bbb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link to a URL associated with game hacks and free currency, identified by heuristics as a lure. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a potentially malicious site for further exploitation, likely involving social engineering to trick users into downloading or interacting with further malicious content.

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/free-coins-on-coin-master-game-hack PDF link annotation
    • https://www.fenews.co.uk/images/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • https://www.fenews.co.uk/images/robux-free-com_GM431946152.pdfIn PDF document text
    • https://www.fenews.co.uk/images/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • https://www.fenews.co.uk/images/coin-master-game-hack-app-download_GM406889139.pdfIn PDF document text
    • https://www.fenews.co.uk/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://www.fenews.co.uk/images/how-do-you-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.fenews.co.uk/images/roblox-tix-generator_GM431946152.pdfIn PDF document text
    • https://www.fenews.co.uk/images/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • https://www.fenews.co.uk/images/hack-coin-master-32-mod-apk_GM406889139.pdfIn PDF document text
    • https://www.fenews.co.uk/images/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://www.fenews.co.uk/images/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.fenews.co.uk/images/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.fenews.co.uk/images/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.fenews.co.uk/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • https://www.fenews.co.uk/images/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • https://www.fenews.co.uk/images/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.fenews.co.uk/images/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.fenews.co.uk/images/roblox-free-body_GM431946152.pdfIn PDF document text
    • https://www.fenews.co.uk/images/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • https://www.fenews.co.uk/images/real-roblox_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_off000049ac.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49AC 25072 bytes
SHA-256: 66403f69cbd4699c997c81d1d743ec2d5d35cb0d665a414a2b3ac77016a5a367
font_01_sfnt_off00008381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8381 17712 bytes
SHA-256: 6ea46f87f2167b805a87cbef3ad9b5ecf4d2513d7b8c5fe933be1d22f28e2546

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