Malicious PDF — malware analysis report

Static analysis result for SHA-256 e25a18fa1b1d3e91…

MALICIOUS

PDF

44.1 KB Created: 2021-05-17 16:06:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 93d47c53728868dbcbe6d5f1cc856149 SHA-1: 6b2599a6bf2b08edd5bdf2c71771f6591b0f65f1 SHA-256: e25a18fa1b1d3e917ebac23d243acf0e7a9722a608579ae4c9a2b0c9a355a363
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 0.9976

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-verification-game-hack PDF link annotation
    • https://www.udivadlahotel.cz/images/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://www.udivadlahotel.cz/images/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.udivadlahotel.cz/images/coin-master-hack-root_GM406889139.pdfIn PDF document text
    • https://www.udivadlahotel.cz/images/send-me-500-2021-spins_GM406889139.pdfIn PDF document text
    • https://www.udivadlahotel.cz/images/robux-2021_GM431946152.pdfIn PDF document text
    • https://www.udivadlahotel.cz/images/coin-master-game-hacks_GM406889139.pdfIn PDF document text
    • https://www.udivadlahotel.cz/images/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • https://www.udivadlahotel.cz/images/coin-master-free-spins-link-no-verification_GM406889139.pdfIn PDF document text
    • https://www.udivadlahotel.cz/images/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • https://www.udivadlahotel.cz/images/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://www.udivadlahotel.cz/images/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.udivadlahotel.cz/images/how-do-you-get-roebucks-for-free_GM431946152.pdfIn PDF document text
    • https://www.udivadlahotel.cz/images/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.udivadlahotel.cz/images/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://www.udivadlahotel.cz/images/no-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.udivadlahotel.cz/images/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://www.udivadlahotel.cz/images/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdfIn PDF document text
    • https://www.udivadlahotel.cz/images/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://www.udivadlahotel.cz/images/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • https://www.udivadlahotel.cz/images/free-robux-without-human-verification_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_off00004ab3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AB3 27500 bytes
SHA-256: f629545c454a55383a4ddb98de8674e64905a9bc9256a36a18c4f242e7a2d524
font_01_sfnt_off000089d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89D6 18372 bytes
SHA-256: 8e16c624761c7815a00ee9013e3827e71f8aa93179f7b81ef6a1eeeaa97f0eaa

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