Malicious PDF — malware analysis report

Static analysis result for SHA-256 c140eeb8387d3d71…

MALICIOUS

PDF

34.5 KB Created: 2021-06-18 07:30:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1c53e9b4b379515121e608361cdade52 SHA-1: 21baa471e828eddc1bcd9a3363bf9dc83679dc82 SHA-256: c140eeb8387d3d715fa4db1e158a4d9b3e6ae503ae61d0cd70d849ef0d19ce68
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/roblox-muscle-legends-cheat-game-hack PDF link annotation
    • http://www.stttekstil.ac.id/elib/repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/robux-hacks-no-verification-2021-computer_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/minecraft-free-education_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/real-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-hack-for-ios_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/app-master_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/hacks-to-get-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-money-cheat-code_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-free-templates-blank_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/real-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/minecraft-wurst-client_GM479516143.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_off00002f68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F68 22268 bytes
SHA-256: 6d0fecf0b6eaa917278c7dea63b8081c1a38dfea6d78452466eed3e626f95d6d
font_01_sfnt_off000060f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F0 19268 bytes
SHA-256: 7b8c602e56abc51f9cbb464af588bdf3777c28d5702c004341ded26ddcdcd374

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