Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a3f526f91171ec0…

MALICIOUS

PDF

35.1 KB Created: 2021-06-23 08:46:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1127baa5dd4f763b584ed18ab886e746 SHA-1: 92aedf9d8a29add039c0a52cad9a9ff10ba847ec SHA-256: 8a3f526f91171ec047aae14ae4d934da9982ebeb70cf1d1e613ddd6922995a65
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF document employs social engineering by promising free Robux, a popular in-game currency, to entice users into downloading a malicious file. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document likely directs users to install a fake browser extension or update, a common tactic for credential theft or malware installation. The embedded URL points to a potential download source for the malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/roblox-how-to-get-free-robux-youtube-2021-game-hack PDF link annotation
    • https://library.um-sorong.ac.id/repository/equixel-free-robux_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/roblox-sunglasses-free_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/mediafre-download-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/roblox-builders-club-free-download_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/free-roblox-girl-shirts_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/ex7-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/how-do-you-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/www-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/avatar-roblox-game_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/rbxfree-free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/youtube-free-robux-codes-urban_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/sites-to-get-free-robux_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_off0000303c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x303C 22472 bytes
SHA-256: 9347051b0b7b1eeb73342942d6833e561674cde4ff5aff9ec0dcdca531da7406
font_01_sfnt_off00006238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6238 19620 bytes
SHA-256: c68630d1a392e7083e94d8cd916fa2cca9bf89f61da218bfebb923d5a5cd8fdb

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