Malicious PDF — malware analysis report

Static analysis result for SHA-256 4436585b75ca40d5…

MALICIOUS

PDF

41.7 KB Created: 2021-05-16 05:05:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e586ec7b43cba93ee76b504409ac754a SHA-1: 96bba2a04fcd54891bb7c6cba747f895adcbb529 SHA-256: 4436585b75ca40d5f675c3617fb7553f3b0dbb592fe76c9dcc65172e51f9f344
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/how-to-get-free-robux-promo-codes-game-hack PDF link annotation
    • https://bancroftandsons.com/images/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • https://bancroftandsons.com/images/cheating-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/strucid-aimbot_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • https://bancroftandsons.com/images/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • https://bancroftandsons.com/images/no-human-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/coin-master-70-spin-link_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://bancroftandsons.com/images/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/coin-master-hack-cydia_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • https://bancroftandsons.com/images/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/play-minecraft-for-free_GM479516143.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_off000048bb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48BB 24180 bytes
SHA-256: 7d37a1fefd974f219c215890a58bc5575afe83456fa5d4a6894fd5255d9af7cc
font_01_sfnt_off00007efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EFC 18872 bytes
SHA-256: 5ac59f2bbd716fa5a12c7062aef47b6358464a1e75e3d61e5fb3ce0da7ae841b

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