Malicious PDF — malware analysis report

Static analysis result for SHA-256 840341d39f0896f4…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 21:40:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bb05512e07a905dc654ca930c497c17d SHA-1: 97f7e5befb8a6c0466f4dbc9e9ae9158836c9a6e SHA-256: 840341d39f0896f4c9956fcb8235416bfa62e24c00ca0bf062baed6319e6b948
62 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs disguised as download links for popular games and in-game currency, such as Minecraft and Roblox. The ML classifier strongly indicated maliciousness, and the presence of external URIs and a clickable URI pointing to a raw IP address further supports this. The document's content and structure suggest it is designed to trick users into downloading potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://netcdn.tw/app/479516143/minecraft-pocket-edition-free-download-game-hack PDF link annotation
    • http://118.98.227.172/opac/repository/today-coin-master-free-coins-link_GM406889139.pdfPDF link annotation
    • http://118.98.227.172/opac/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/hackear-gente-en-roblox_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/roblox-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-robux-gift-card-amazon_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-roblox-injector_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-to-cheat-robux-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-to-hack-roblox-plaza_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/robux-generator-hack-2021-apk_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/robloxcom-cheat-codes_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/roblox-hack-tools-in-all-games_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/hack-give-robux_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-to-cheat-in-musical-chairs-roblox_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-to-hack-granny-in-roblox_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-to-get-free-robux-really-works_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-to-get-free-robux-not-a-scam_GM431946152.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
font_00_sfnt_off00003092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3092 22120 bytes
SHA-256: 63638d191fda125f5ee004bb426644400e379a247e1a0a57891eed019381ef04
font_01_sfnt_off00006194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6194 18900 bytes
SHA-256: e997c6825c31d07da770567e7ce25c132e242bbd6499ebc453973595e8028df8

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