Malicious PDF — malware analysis report

Static analysis result for SHA-256 729436229291e875…

MALICIOUS

PDF

46.8 KB Created: 2021-06-11 04:26:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c00e2423cf4fe405739f2abf678c7ec3 SHA-1: 000064514ce48474a864a443e45a1a51f8138167 SHA-256: 729436229291e87521718974ef4447ade4716158235b9567dd00eaf275ea844a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous embedded URLs and a heuristic firing for a PDF link farm, indicating a likely attempt to direct users to external, potentially malicious content. The presence of a 'download button' lure further supports a phishing or scam-related attack pattern. The ML classifier's high confidence score reinforces the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/free-robux-without-download-pc-game-hack
    • http://suaedy-library.net/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdf
    • http://suaedy-library.net/repository/pokemon-go-free-zoom_GM1094591345.pdf
    • http://suaedy-library.net/repository/best-site-for-free-coin-master_GM406889139.pdf
    • http://suaedy-library.net/repository/coin-master-daily-free-spins-link-app_GM406889139.pdf
    • http://suaedy-library.net/repository/coin-master-free-spins-daily_GM406889139.pdf
    • http://suaedy-library.net/repository/coin-master-free-spin-today_GM406889139.pdf
    • http://suaedy-library.net/repository/coin-master-free-in-app-purchases_GM406889139.pdf
    • http://suaedy-library.net/repository/roblox-download_GM431946152.pdf
    • http://suaedy-library.net/repository/roblox-robux_GM431946152.pdf
    • http://suaedy-library.net/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdf
    • http://suaedy-library.net/repository/robux-premium_GM431946152.pdf
    • http://suaedy-library.net/repository/coin-master-free-coins-twitter_GM406889139.pdf
    • http://suaedy-library.net/repository/coin-master-hack-apk-free-download_GM406889139.pdf
    • http://suaedy-library.net/repository/roblox-free-kins_GM431946152.pdf
    • http://suaedy-library.net/repository/minecraft-java-edition-free-trial_GM479516143.pdf
    • http://suaedy-library.net/repository/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdf
    • http://suaedy-library.net/repository/minecraft-pe-apk-free-download_GM479516143.pdf
    • http://suaedy-library.net/repository/coin-master-free-spins-and-coins-for-today_GM406889139.pdf
    • http://suaedy-library.net/repository/free-robux-no-human-verification-generator_GM431946152.pdf
    • http://suaedy-library.net/repository/coin-master-free-spins-and-coins-haktuts_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005302.bin
5a11b6d78416b266923a4c93758ab4f28b9ad9657fb6e114673e5bdd3ab720d7		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5302 27256 bytes
font_01_sfnt_off000090b5.bin
e1b3bda53ced8a911b57ae24d8122052bcea564eaddee0bb8529d9e1c8654aab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90B5 19564 bytes

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