Malicious PDF — malware analysis report

Static analysis result for SHA-256 900a8dc45dbcf13d…

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 08:05:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4e7299a9edef25a98add1dee2bdc914f SHA-1: 34c68c71029d40921353d7cb24a8b0a8d6506954 SHA-256: 900a8dc45dbcf13d5325a99fc004b11ed914961cf10efae54f61d22e85d9d709
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 0.9864

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.online/app/479516143/how-to-get-minecraft-bedrock-edition-on-pc-for-free-game-hack PDF link annotation
    • http://apartmani-mestrovic-krk.hr/files/how-to-get-free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/instant-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/free-minecraft-realm-codes_GM479516143.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/coinmaster-twitter_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/free-minecraft-videos_GM479516143.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/call-roblox-for-free-robux_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/coun-master_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/coin-master-free-spins-2021-ios_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/robux-online_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/games-like-coin-master-for-free_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_004_off000054d6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54D6 25448 bytes
SHA-256: b69821e7994a4b744a43fc44b284eca6fde8512d961c8710d4dd3eb15b403697
font_01_sfnt_off00008e12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E12 18588 bytes
SHA-256: 22ac8c3ecfb52a55793ff71594f7fcfb36c91cb725e140eddc746c1d049752ce

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