Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f54f5defd758171…

MALICIOUS

PDF

32.7 KB Created: 2021-07-05 22:21:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1f76499d0960bdcf35ea010e8e86c224 SHA-1: c4cb943fd6facefbbf5051e4d22d4cdd13fd8bc0 SHA-256: 9f54f5defd7581710401140bffbc3faac43782c0e4adefbfb3c1922d507eeb9a
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, including one pointing to an IP address, that are designed to lure users into downloading game hacks or other potentially unwanted software. The ML classifier strongly indicated maliciousness, and the presence of external URIs suggests an attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/431946152/free-robux-groups-2021-game-hack PDF link annotation
    • http://183.91.70.7/repository/coin-master-hack-blogspot_GM406889139.pdfPDF link annotation
    • http://183.91.70.7/repository/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • http://183.91.70.7//repository/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • http://183.91.70.7//repository/free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/coin-master-hacks-for-pet-food_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/coin-master-download-hack_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/roblox-hack-tool-apk_GM431946152.pdfIn PDF document text
    • http://183.91.70.7//repository/coin-master-homepage_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/coin-master-links-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/free-robux-no-password-obby_GM431946152.pdfIn PDF document text
    • http://183.91.70.7/repository/dev-hack-roblox_GM431946152.pdfIn PDF document text
    • http://183.91.70.7/repository/coin-master-hack-without-verification-code-2021_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • http://183.91.70.7/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/download-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://183.91.70.7//repository/real-robux_GM431946152.pdfIn PDF document text
    • http://183.91.70.7//repository/what-pubg-uc-code_GM1330123889.pdfIn PDF document text
    • http://183.91.70.7/repository/coin-master-free-chip_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
font_00_sfnt_off0000289a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x289A 22240 bytes
SHA-256: 237491f76f17a25aa54aa3838f10a8972e0972bffde2a3654a0a1bda8b434a44
font_01_sfnt_off00005a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A03 19296 bytes
SHA-256: b274ca6d2e3d14a2eaf0a8d8f251c670de139d2f59e1f69b73bb52ee948191dd

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