Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7d58e054e4ab14d…

MALICIOUS

PDF

42.0 KB Created: 2021-05-13 00:22:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: deaf004a7d7a14d3cce1c98ca62565f5 SHA-1: 14055cfa92c49f6a8af268a283fd2c95ce83c8a8 SHA-256: a7d58e054e4ab14dc327bdea525ab863a0b61afd26ec47f2b7a0cc01fbf636ff
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/free-limiteds-roblox-game-hack PDF link annotation
    • http://thamelinn.com/userfiles/files/robux-only_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/roblox-account-taker_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-free-spins-android_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/todays-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-robux-website_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-robux-co_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/robux-gratis_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/easy-robux-today-com_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
font_00_sfnt_off000046b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46B3 25180 bytes
SHA-256: 90ffa7d51d4fc4e5268cf77d7e844c8dd012fbc8902bd13a36015349e09315f1
font_01_sfnt_off000080cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80CF 18604 bytes
SHA-256: cd6e3b888b69b87eccf2bd9bf0eaf83aa01cccd071b198ee6fa00879ae765b94

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