Malicious PDF — malware analysis report

Static analysis result for SHA-256 a374dee53cb21573…

MALICIOUS

PDF

35.6 KB Created: 2021-07-06 07:51:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0b21e8337796519b8f23edd24c22bd70 SHA-1: b094c7e677a659889f4e305d5253f96e050146ea SHA-256: a374dee53cb2157318e6638cb263bba87d8957a95db356e0def982b62582978e
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.tw/app/431946152/roblox-generator-game-hack PDF link annotation
    • http://elibrary.perludem.org/repository/roblox-ban_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-look-aesthetic-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-mermaid-halo-roblox-royale-high_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-do-i-get-robux-for-free-without-paying-dollars_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-in-roblox-rocash-com_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-free-girl-uniforms_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-hack-roblox-mobile-ios_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-bit-ly_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-gift-card-codes-2021-not-used-england_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/como-conseguir-robux-gratis-en-roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-hacker-tycoon-itowngameplay_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-clothes-on-roblox-without-bc_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-map-uncopylocked_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-script-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-booga-booga-mojo-hack-wearedevs_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spin-link-today-16-11-2021_GM406889139.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_off0000345d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x345D 22848 bytes
SHA-256: 6c3972d945ff597628a4f5cee6d13ed1f3d5ca1d08c3f7ce61847d0755521a0b
font_01_sfnt_off00006782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6782 18592 bytes
SHA-256: 68271f200223164cdf70c56f3676259a7dde0d10d370ccf87a2c74b2a325e86c

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