Malicious PDF — malware analysis report

Static analysis result for SHA-256 7077651d08d0b24e…

MALICIOUS

PDF

35.0 KB Created: 2021-06-28 15:34:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f9ad2240d7d0e375997a74594e04d81b SHA-1: fb6e6aa0d1cb6ebcf9210d88c4c6ad933fdc65cf SHA-256: 7077651d08d0b24ec7bdb64ad0ba0ebabebfab6f68b1ded6211a9fc425ca4d64
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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/how-to-use-inspect-element-to-hack-robux-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/roblox-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/robux-free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-galleons-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-roblox-followers_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-jaubreak-hack-script-auto-rob_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-spins-daily-link-game-mod_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-videos_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-online-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-how-to-hack-groups_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/wurst-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/hack-robux-2021-inspect-element_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-svg-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/codes-to-get-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/egg-farm-simulator-roblox-hack_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_off00003081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3081 22420 bytes
SHA-256: 4bfcb7f770762d162fd7f575f61da82b6dfaa9b450cc21a4238be71aac74d0a2
font_01_sfnt_off00006277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6277 19500 bytes
SHA-256: 8ae5d731b91a2b0117ac981e5070e95496202b2764e0a48ce33843f397c790bd

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