Malicious PDF — malware analysis report

Static analysis result for SHA-256 123a8f959d31953a…

MALICIOUS

PDF

48.1 KB Created: 2021-06-08 12:49:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d63421d78a63d6d01e2171720493c248 SHA-1: 2523278355eec41472d5f7a5d9eeb08a96f2ca6c SHA-256: 123a8f959d31953a100e9f74e520c7acb6657af1797aa776fd0ec4de88585808
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF repositories. These links promote topics like 'free Robux' and game hacks, indicating a likely scam or phishing attempt. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the embedded URLs and the PDF structure strongly suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/youtube-roblox-get-free-robux-game-hack
    • http://digilibfisip.unla.ac.id/repository/coin-master-daily-free-spins-2021_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/mcpe-master-coin-hack-apk_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/robux-free-2021_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/coin-master-20-free-spins-link-today_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/how-to-get-20210-robux-for-free_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/free-robux-without-downloading-apps_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/hack-coin-pro-coin-master_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/get-free-spins-coin-master_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/how-to-get-free-tiktok-followers_GM835599320.pdf
    • http://digilibfisip.unla.ac.id/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/how-to-earn-robux-for-free-2021_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/pokemon-go-free-codes_GM1094591345.pdf
    • http://digilibfisip.unla.ac.id/repository/coin-master-apk-hack-download_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/free-robux-no-scam_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/coin-master-daily-free-spins-hack_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/static-moonactive_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/minecraft-free-ios-2021_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005149.bin
d3a45b69a8a679fc64dc6c6675607fa62700cd9e1a3676b256de08cc979c892c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5149 26320 bytes
font_01_sfnt_off00008bba.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BBA 5696 bytes
font_02_sfnt_off000098cc.bin
d3b679acc5452400e6e7be842237eb77a589ee16c2e034c1982ca53c3825db92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98CC 18356 bytes

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