Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d864ea0cdc05253…

MALICIOUS

PDF

41.8 KB Created: 2021-05-12 14:31:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: eeea0a79381547be9f9514b78cd6904e SHA-1: 09d04bf2d11969d44c50560ec3d794c14e6f0b06 SHA-256: 4d864ea0cdc0525362663a941c5f22c1b34dfccb4f0aef99ea0018ff706543c3
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 designed as SEO link farms for game cheats and virtual currency. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate malicious intent. The document likely serves as a lure to direct users to potentially malicious sites that could host further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/coin-master-free-spins-hack-game-hack
    • https://library.uigm.ac.id/repository/sites-to-get-free-robux_GM431946152.pdf
    • https://library.uigm.ac.id/repository/how-to-get-free-robux_GM431946152.pdf
    • https://library.uigm.ac.id/repository/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdf
    • https://library.uigm.ac.id/repository/free-coin-master-coins_GM406889139.pdf
    • https://library.uigm.ac.id/repository/how-to-get-800-robux-for-free_GM431946152.pdf
    • https://library.uigm.ac.id/repository/coin-master-hack-online-generator_GM406889139.pdf
    • https://library.uigm.ac.id/repository/free-pet-snacks-coin-master_GM406889139.pdf
    • https://library.uigm.ac.id/repository/how-to-get-a-lot-of-robux_GM431946152.pdf
    • https://library.uigm.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdf
    • https://library.uigm.ac.id/repository/roblox-free-clothes-hack_GM431946152.pdf
    • https://library.uigm.ac.id/repository/minecraft-for-free-on-phone_GM479516143.pdf
    • https://library.uigm.ac.id/repository/free-robux-hack-no-human-verification_GM431946152.pdf
    • https://library.uigm.ac.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdf
    • https://library.uigm.ac.id/repository/wwwcoin-master-free-spincom_GM406889139.pdf
    • https://library.uigm.ac.id/repository/best-free-hacked-client_GM479516143.pdf
    • https://library.uigm.ac.id/repository/get-robux-com_GM431946152.pdf
    • https://library.uigm.ac.id/repository/hacking-apps-for-roblox_GM431946152.pdf
    • https://library.uigm.ac.id/repository/how-to-get-free-robux-easy-2021_GM431946152.pdf
    • https://library.uigm.ac.id/repository/coin-master-hack-version-2021-download_GM406889139.pdf
    • https://library.uigm.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000499f.bin
bbee6648ced57381cff24bdb98a96a94ef5461d73d1ac088b899e631eea40871		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x499F 24628 bytes
font_01_sfnt_off000081ec.bin
5bc30252b20e252a4e4f12754ee6fd7a8bdc905346c0352a18cf9aa56584dd16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81EC 18056 bytes

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