Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e85979a162e94eb…

MALICIOUS

PDF

34.8 KB Created: 2021-07-07 06:31:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2f4b402120c3b75dccf7cf2fb9a763c7 SHA-1: e03a2f1e3c6b7c578b37018f08d8a988a5576b93 SHA-256: 5e85979a162e94eb364710c08da8c6fc031cb3fd0d6ed86d3893e8c7c5578ac0
142 Risk Score

Malware Insights

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

The PDF contains numerous links to websites offering game hacks and free in-game currency, such as 'coin-master-free-spin-download-game-hack'. This indicates a lure to trick users into visiting potentially malicious sites. The heuristic 'PDF_SEO_LINK_FARM' further suggests the document is part of a larger scheme to generate traffic to these types of pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/406889139/coin-master-free-spin-download-game-hack PDF link annotation
    • http://cleansui.com.tw/image/data/files/how-to-get-free-roblox-codes-2021-may-sunny-hollow_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/purest-roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/jake-paul-merch-roblox-free_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/delete-anything-roblox-hack-script_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/roblox-hack-tool-cheat-hackercom_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/best-roblox-hack-guis_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/roblox-hack-siteleri_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/how-to-get-free-robux-no-inspect-2021_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/www-rbx-com_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/roblox-how-to-get-non-free-models_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/hack-assassin-roblox_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/minecraft-nintendo-switch-digital-code-free_GM479516143.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/tiktok-free-view-iphone-survey_GM835599320.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/old-roblox-accounts-for-free_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
stream_002_off0000312a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x312A 22680 bytes
SHA-256: 3415896051dc65d174937cfecf1b29f12e7cef3c67644ae8685a6fd1ca23c038
font_01_sfnt_off000063ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63EC 18756 bytes
SHA-256: a0866289d0ce43df37912342f65a9428a0679980fc9fde786a6df1a60cf71805

Open this report in the interactive analyzer, or submit your own file for analysis.