Malicious PDF — malware analysis report

Static analysis result for SHA-256 c00cb0a1813ef46e…

MALICIOUS

PDF

42.5 KB Created: 2021-05-20 03:52:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 69299988db1451201122fc37295db57d SHA-1: 6974aa3e65223866b1e41f35f152c103c64e6f08 SHA-256: c00cb0a1813ef46edfab022e8477add68d192f86ef96194595ae991a8cf77c47
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. 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 0.9971

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 https://netcdn.xyz/app/431946152/roblox-robux-generator-2021-game-hack PDF link annotation
    • http://linens.kiev.ua/images/how-to-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/free-roblox-gfx_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/free-minecraft-account-list_GM479516143.pdfIn PDF document text
    • http://linens.kiev.ua/images/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/free-online-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://linens.kiev.ua/images/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-mod-apk-2021_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/minecraft-java-free-account_GM479516143.pdfIn PDF document text
    • http://linens.kiev.ua/images/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • http://linens.kiev.ua/images/spin-free-coin-master_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_off000048d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48D3 25884 bytes
SHA-256: 5b7d04a488af490eb10db9068530803059fe21c19de399a5d5a5ae0198d46359
font_01_sfnt_off00008236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8236 18660 bytes
SHA-256: 36c7fb5aa9c939457b824274e74d572de6a8f68b62037621f1b97da7e9e8e63e

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