Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7ce0000f54c013f…

MALICIOUS

PDF

43.9 KB Created: 2021-05-12 01:02:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a8c358994a49c5484f6c6a78d641440d SHA-1: 240f656292513998fd2550f92508bfa0dfcbd5d8 SHA-256: e7ce0000f54c013f14bcc632d027a4db3a23bc08087fb4c347cafb35e7a16a2d
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are structured as SEO link farms for game hacks and free currency. The primary lure appears to be 'robux-com-free-game-hack', directing to a suspicious URL. The presence of a large number of external links suggests a link farm or redirection scheme designed to lead users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/robux-com-free-game-hack PDF link annotation
    • http://library.atim.ac.id/repository/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-400-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/best-free-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-daily-bonus-hack_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_off000048db.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48DB 27828 bytes
SHA-256: ec81d19ce4057e15632fdf1c53793e34b704f1ada8c390e9289765f55c5ea651
font_01_sfnt_off0000897e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x897E 18276 bytes
SHA-256: 15a0db03ecad41b32ad15729058012b5ee1d917146ec7af3e780186d41394abc

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