Malicious PDF — malware analysis report

Static analysis result for SHA-256 f233f4ba714753fd…

MALICIOUS

PDF

38.0 KB Created: 2021-06-03 22:03:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5edd489911bea5d80839ea0a610f8939 SHA-1: 208cb787e4acda97635b6f79a6d04f064fa05c7a SHA-256: f233f4ba714753fd0f1beb0dac4f71425a1471cab853f7cb3b59d02eacb4f96c
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 3

  • 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.
  • 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.online/app/431946152/roblox-hack-site-2021-game-hack PDF link annotation
    • http://www.js100.com/uploads/ckeditor/files/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/pokemon-go-free-pokeballs-2021_GM1094591345.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/roblox-games-to-play-for-free_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/pokemon-go-free-storage-upgrade_GM1094591345.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-hack-coin-master-computer_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EFF 26524 bytes
SHA-256: 45bd543b5bd836e6e265413aecedee44272ec730e9a9fe6305cd4a3b99d3f16d