Malicious PDF — malware analysis report

Static analysis result for SHA-256 453fff939df3a562…

MALICIOUS

PDF

33.4 KB Created: 2021-07-04 09:13:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 613396693026cb68da4b4c7b7f651300 SHA-1: 25dfe3fb41d87e94a697a96c8959d91debfefdd2 SHA-256: 453fff939df3a562f36d7dabbe05f1f95540432ebbdad0ebf2b52e336bf4ad3f
102 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 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/how-to-hack-robux-game-hack PDF link annotation
    • http://36.94.36.7/elib/repository/free-robux-gift-cards-2021_GM431946152.pdfPDF link annotation
    • http://36.94.36.7/elib//repository/coin-master-free-spin-now_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/robux-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/roblox-lua-hack-scripts_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/how-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/roblox-how-to-hack-gears-online-rpg_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/is-roblox-free-on-xbox_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_off00002d68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D68 21880 bytes
SHA-256: 2df61d48ffe31c59356a413efefb5542c4bd0d17fc67688388ee5b4f3396acf9
font_01_sfnt_off00005db7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB7 18884 bytes
SHA-256: eabb09a914750731f64ad11a0b688188fe1798403d7ade495959fd69a4976413

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