Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e6d75704e69135d…

MALICIOUS

PDF

44.7 KB Created: 2021-05-17 07:25:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7329126ebf65532ab77746d7d74870ba SHA-1: 27cd8fea516cb888f694300ff3996fe33f23204a SHA-256: 3e6d75704e69135de560495ae35da76fba416a06c4ec389d28663622c009e87d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links to external websites, identified by the PDF_SEO_LINK_FARM and PDF_URI heuristics. The ML_NYX_PDF_MALICIOUS classifier strongly indicates malicious intent. While no scripts were explicitly extracted, the document body contains URLs that are likely intended to lead the user to download malicious content or engage in phishing, consistent with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/406889139/moon-active-games-game-hack
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/coin-master-spin-link-today_GM406889139.pdf
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/master-free-spin-and-coin-links-html-m-1_GM406889139.pdf
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/freespincoin-masterlinkdownload_GM406889139.pdf
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/coin-master-spin-link-hack_GM406889139.pdf
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/free-coins-coin-master-no-human-verification_GM406889139.pdf
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/rbx-free-robux_GM431946152.pdf
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/coin-master-hack-spins-free_GM406889139.pdf
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/how-to-get-free-things-on-roblox_GM431946152.pdf
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/roblox-free-robux_GM431946152.pdf
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/how-to-get-free-robux-inspect_GM431946152.pdf
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/coin-master-blogspot-free-spins_GM406889139.pdf
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/coin-master-free-spins-haktuts_GM406889139.pdf
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/minecraft-bedrock-free-server-hosting_GM479516143.pdf
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/free-robux-2021-no-verification_GM431946152.pdf
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/how-to-play-minecraft-with-friends-for-free_GM479516143.pdf
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/coin-master-hack-pro-gamers_GM406889139.pdf
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/fan-page-coin-master_GM406889139.pdf
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/free-robux-codes-no-verification-2021_GM431946152.pdf
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/coin-master-free-daily-rewards_GM406889139.pdf
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/new-free-money-links-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b8c.bin
4ebe27ce20824e927f55110eee90485b534a1c284302975b74bf949db3fb8555		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B8C 30064 bytes
font_01_sfnt_off00008da9.bin
6572202fb11b79787028deba1beb076b209f1779d589edab2c04e97f197d6ee2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA9 17920 bytes

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