Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b41e1bdc19df86e…

MALICIOUS

PDF

35.0 KB Created: 2021-06-28 06:25:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 44615714547d750731f8d575ab279073 SHA-1: 6926bc3939c1d9872a36d270521ca79147bb21e0 SHA-256: 9b41e1bdc19df86e8453e13ae38e19a5dc49ce604c3546a9606d1399d6db6c82
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a malicious lure, specifically a link farm designed to redirect users to potentially harmful websites. The document body and embedded URLs promote 'free Robux' and 'free spins', which are common pretexts for phishing or malware distribution. The ML classifier and PDF SEO link farm heuristic strongly indicate malicious intent, likely to drive traffic to exploit or scam pages.

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 http://netcdn.co/app/431946152/free-robux-obby-50-000-r-game-hack PDF link annotation
    • https://7gking.tw/upload/files/coin-master-free-spins-link-without-human-verification_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/easy-and-fast-quickest-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/how-to-get-free-robux-kindle-fire_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/coin-master-jackpot-madness-hack_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/roblox-free-robux-generator-com_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-working-roblox-cards_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-robux-inspecting-method_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/roblox-prison-life-speed-hack_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/roblox-cheats-how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/raindrop-free-roblox_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-robux-list_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/coin-master-34-4-hack-download_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/coin-master-free-spin-and-trading_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/change-your-name-for-free-roblox_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_off00002f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F70 23008 bytes
SHA-256: 47b46c11d70ef689603a451b108d595e970ffda37518cfdf7dfff14b2c3344c9
font_01_sfnt_off00006301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6301 19200 bytes
SHA-256: fb02d622689e1400126106967bbdf9f57418e1de1ee0870c74be943ea76c0a41

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