Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cc536a47e984354…

MALICIOUS

PDF

34.1 KB Created: 2021-06-27 11:45:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 753b9a3780b730b125cbe7370262806e SHA-1: ebd87660aa9e4e62cfb1a5b77c9fd89d3cd8fe44 SHA-256: 7cc536a47e984354b19b8821b129dfc7ce64e3ca680aff49e066bf615bde72c2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link disguised as a 'free generator / game hack' for Counter Blox Roblox. This lure, combined with the ML classifier's high confidence and the presence of numerous similar URLs, strongly suggests a social engineering tactic to trick users into visiting potentially malicious websites. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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.co/app/431946152/counter-blox-roblox-hax-free-game-hack PDF link annotation
    • https://goodtools.tw/upload/files/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-2021-november-hacked_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-free-robux-5-steps_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-hack-engine-for-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-speed-hack-in-swordburst-2-in-roblox_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-tiktok-video_GM835599320.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-app-download-pc_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/minecraft-client-download_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/hack-fly-roblox-2021-may_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/robux-hack-download-2021_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-roblox-cards-no-scam_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-today-pc_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-spin-coin-master-ios_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_off00002de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DE2 22732 bytes
SHA-256: f713e7d1d5604493954ab37156667a7352226fb4217f18e0852632b1d1c27678
font_01_sfnt_off000060be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60BE 18896 bytes
SHA-256: 9877ccd06d067536f74607e5a95d5e95a5f3b17db2dab9c01ffa786ea1e8939d

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