Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5d4031bd9976e24…

MALICIOUS

PDF

44.6 KB Created: 2021-05-12 18:33:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 118392a2843d7af0bf76387668827555 SHA-1: 991822a6604d6d209a5344ecfc0a8814a2ced89d SHA-256: f5d4031bd9976e24bf441d22468f724896fd331b62fd5edd65c16e2a4e198b61
122 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 0.9980

Heuristics 5

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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/roblox-free-hair-codes-game-hack PDF link annotation
    • https://wagstaffgroup.co.uk/media/storage/editor/files/coin-master-hacks-for-spins_GM406889139.pdfIn PDF document text
    • https://wagstaffgroup.co.uk/media/storage/editor/files/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://wagstaffgroup.co.uk/media/storage/editor/files/robux-offers_GM431946152.pdfIn PDF document text
    • https://wagstaffgroup.co.uk/media/storage/editor/files/doctor-louie-roblox_GM431946152.pdfIn PDF document text
    • https://wagstaffgroup.co.uk/media/storage/editor/files/robux-online_GM431946152.pdfIn PDF document text
    • https://wagstaffgroup.co.uk/media/storage/editor/files/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdfIn PDF document text
    • https://wagstaffgroup.co.uk/media/storage/editor/files/roblox-character-free_GM431946152.pdfIn PDF document text
    • https://wagstaffgroup.co.uk/media/storage/editor/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://wagstaffgroup.co.uk/media/storage/editor/files/coin-master-free-spin-now_GM406889139.pdfIn PDF document text
    • https://wagstaffgroup.co.uk/media/storage/editor/files/how-to-get-free-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • https://wagstaffgroup.co.uk/media/storage/editor/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://wagstaffgroup.co.uk/media/storage/editor/files/coin-master-unlimited-spin-hack_GM406889139.pdfIn PDF document text
    • https://wagstaffgroup.co.uk/media/storage/editor/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://wagstaffgroup.co.uk/media/storage/editor/files/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • https://wagstaffgroup.co.uk/media/storage/editor/files/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • https://wagstaffgroup.co.uk/media/storage/editor/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://wagstaffgroup.co.uk/media/storage/editor/files/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • https://wagstaffgroup.co.uk/media/storage/editor/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • https://wagstaffgroup.co.uk/media/storage/editor/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://wagstaffgroup.co.uk/media/storage/editor/files/coin-master-cracked-apk-free-download_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_off00004b09.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B09 28072 bytes
SHA-256: f991316745e597472f21f8e575b34c2abb87582dd15ff7738d42829007b125d4
font_01_sfnt_off00008b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B6F 18472 bytes
SHA-256: 0c34ab104977070915151016e24e35187f8354093682c5401cbbc3770fde4f5e

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