Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8952e6f231fae87…

MALICIOUS

PDF

46.5 KB Created: 2021-05-12 22:33:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 60ce0fa4a63491db6eadd7f17eb3096a SHA-1: 093c6093cd6d5cdc00480643c6bee09fc3b461b7 SHA-256: a8952e6f231fae87907e1708cd2bee9f30c5deb642d763dc3d1ba43f5c2a4fa7
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links and a link farm heuristic firing, suggesting a phishing or scam attempt. The document body and extracted URLs promote 'free Robux' and 'free spins', indicating a lure for potentially malicious content. While no scripts were directly extracted, the PDF structure and link farm suggest it's designed to redirect users to external sites that may host malware or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 4

  • 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.
  • 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-robux-without-human-verification-real-game-hack
    • http://ordineavvocatitempio.it/images/free-spins-on-coin-master-hack_GM406889139.pdf
    • http://ordineavvocatitempio.it/images/how-to-get-free-robux-website_GM431946152.pdf
    • http://ordineavvocatitempio.it/images/minecraft-skins-free-girl_GM479516143.pdf
    • http://ordineavvocatitempio.it/images/coin-master-free-spins--coins-2021_GM406889139.pdf
    • http://ordineavvocatitempio.it/images/wwwcoin-master-hack-game-download_GM406889139.pdf
    • http://ordineavvocatitempio.it/images/roblox-promo-code-to-get-free-robux_GM431946152.pdf
    • http://ordineavvocatitempio.it/images/free-coin-master-s_GM406889139.pdf
    • http://ordineavvocatitempio.it/images/best-free-hacked-client_GM479516143.pdf
    • http://ordineavvocatitempio.it/images/coin-master-heaven-links-free-spins_GM406889139.pdf
    • http://ordineavvocatitempio.it/images/free-robux-hack-us_GM431946152.pdf
    • http://ordineavvocatitempio.it/images/coin-master-free-spins-iphone_GM406889139.pdf
    • http://ordineavvocatitempio.it/images/how-to-get-free-premium-roblox_GM431946152.pdf
    • http://ordineavvocatitempio.it/images/free-coins-coin-master-2021_GM406889139.pdf
    • http://ordineavvocatitempio.it/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdf
    • http://ordineavvocatitempio.it/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdf
    • http://ordineavvocatitempio.it/images/hack-coin-master-game-apk_GM406889139.pdf
    • http://ordineavvocatitempio.it/images/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdf
    • http://ordineavvocatitempio.it/images/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • http://ordineavvocatitempio.it/images/coin-master-free-spins--spins_GM406889139.pdf
    • http://ordineavvocatitempio.it/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a1a.bin
2fb3fc35f87b9cd1832f7d52e26dc76f0294b1e88888fd76346379e1d7dc3ae3		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A1A 25080 bytes
font_01_sfnt_off000083f9.bin
608f0dd4f6bfb6adbccec84228618ee8e4c9e09226d7330efb5300e499d1567f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83F9 3608 bytes
font_02_sfnt_off00009081.bin
fcd37aae12381262441149b3f055c838aea0a99c045645b338d4096dcdd54a9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9081 19296 bytes

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