Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9e9446f1c36ea99…

MALICIOUS

PDF

43.8 KB Created: 2021-05-17 16:35:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4c54acfc44cd04a595fda69699b42f1f SHA-1: 728ee13e6ce59e23f0c8b34515f974c1c6eae5d6 SHA-256: c9e9446f1c36ea99e2b5a46c1e19397b74bfbe7df945b2d1d7b5c64401aa5293
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links to external websites, many of which are structured as SEO link farms. The document body and extracted URLs suggest a lure related to obtaining free in-game currency or hacks for popular games like Robux and Coin Master. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/is-it-possible-to-get-free-robux-game-hack PDF link annotation
    • http://www.reach360stock.com/uploaded_files/userfiles/files/coin-master-cards_GM406889139.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/how-to-get-free-roblox-items_GM431946152.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/coin-master-hack-tool-access-online-generator_GM406889139.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/oprewards-robux_GM431946152.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/coin-master-latest-mod-apk-free-download_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_off00004b8a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B8A 27120 bytes
SHA-256: 13a00cc8558789ea6bc19373c60bcd7ac2344267ab9cc92e7b56416b52a9ccdb
font_01_sfnt_off00008862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8862 18464 bytes
SHA-256: 524b785793646940a6547919a11f6df6f4967036cf63710b5a4934c88ca16ae7

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