Malicious PDF — malware analysis report

Static analysis result for SHA-256 547fed521fbe09da…

MALICIOUS

PDF

41.7 KB Created: 2021-05-14 18:22:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e41ff73858319a8e9192d7612c288f90 SHA-1: 903b2f30ba7b28258152b60225af3141587d4f59 SHA-256: 547fed521fbe09daad2af225b2cbddaba65c97e8c75d838b1e5f4b171e373400
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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/479516143/simplysarc-game-hack PDF link annotation
    • http://bufbd.org/images/httpswwwurcouponsdealcom202103coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/my-roblox-account-was-hacked_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • http://bufbd.org/images/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/master-game_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • http://bufbd.org/images/coin-master-hack-tips_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/free-robux-come_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/cone-master_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/rbx-robux_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/how-to-get-free-robux-without-downloading-any-apps_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_off000047bd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47BD 25476 bytes
SHA-256: bf6b924543b653fe95c3d4943c210ec70945b02da5b58ebbf75e4ad25670630e
font_01_sfnt_off00008154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8154 18156 bytes
SHA-256: d1e3c8cc46daa8b4e8a3620fd036fa3afc0951971ec214e12238e772f71f3550

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