Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc33ac8aacaf94b…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 17:32:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: af5e4b2c6c930180413ee1a647ec576c SHA-1: 8eb3e32a6e5c0dabd50d81d861933f5819f6d771 SHA-256: 5cc33ac8aacaf94b70e535ca681888d86d7a06d6b1492de23736027b6a1c1a50
82 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are disguised as game hack generators for popular mobile games like Coin Master and Roblox. The heuristic firings indicate that these links are intended to lure users to potentially malicious sites, likely for phishing or to download further malware. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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/how-to-get-free-spins-on-coin-master-iphone-game-hack PDF link annotation
    • http://perpus.masda.ac.id/repository/coin-master-32-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-free-robux-generator-com_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/youtube-free-roblox-account_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-roblox-accounts-with-robux-august_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/aimbot-hack-roblox-assassin_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-roblox-followers-generator_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-spin-game_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/mcpe-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-hack-999999-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/pubg-uc-website-india_GM1330123889.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-case-clicker-hack-script_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_off000032bf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32BF 22964 bytes
SHA-256: d452a44b06caeb3007c5ba072558237eb0d19c0d08538c873db2bc6b7464500f
font_01_sfnt_off00006648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6648 18504 bytes
SHA-256: fb94ba828be114796ce33ae88e534852be4d565d50d53dd599267a6729c84c7e

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