Malicious PDF — malware analysis report

Static analysis result for SHA-256 2db67959e3f3a83b…

MALICIOUS

PDF

35.5 KB Created: 2021-07-07 22:06:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 12c7c747c2c8cb6d246b53565cecf8c5 SHA-1: 2a2ec6c61235b259d53c9d234f7b4386a4c44400 SHA-256: 2db67959e3f3a83b900c1040bf1961732fdd49a8e70347e94d64745d231c29b3
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/earn-free-robux-on-roblox-game-hack PDF link annotation
    • http://118.98.227.172/opac/repository/speed-hack-roblox-download-free_GM431946152.pdfPDF link annotation
    • http://118.98.227.172/opac/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/roblox-hack-game-apk_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-to-get-free-stff-on-roblox-youtube_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/hack-exploit-for-roblox-no-virus_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/roblox-bee-swarm-simulator-script-hack_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/roblox-before-dawn-hack_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-to-get-a-free-epic-face-on-roblox_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-to-hack-bedwars-2-on-roblox_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/roblox-script-hack-gui_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/tiktok-for-free-online_GM835599320.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-to-not-get-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-to-get-hacks-on-roblox-mobile-2021_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-robux-generator-only-quiz_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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
stream_002_off00003391.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3391 22840 bytes
SHA-256: 7afc3a7f74386ea9444f4915248134dd03df8adb698ef8bd4bcefd882ce5641e
font_01_sfnt_off000066b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66B9 18788 bytes
SHA-256: af3555bc1f517b69886570aade67a9791766090da4e1e41d0d69d2926e00b478

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