Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cab5052fa10c91b…

MALICIOUS

PDF

34.9 KB Created: 2021-06-25 16:43:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d389d4f19202382d8c3f7d8c2a3f9d66 SHA-1: 7f6b95fb9d5cbbb94a01e024fa7629777a045aea SHA-256: 8cab5052fa10c91b1924f35c26f1cbd056331bd7863c46325b119507f6a54329
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are structured as SEO link farms for game-related hacks and cheats. The presence of a download button lure and the ML classifier's high confidence score indicate a malicious intent to direct users to potentially harmful content or malware downloads. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/blue-pants-roblox-free-game-hack
    • http://pustaka.ust.ac.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/hack-mining-simulator-roblox-2021_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/free-roblox-no-surveys-or-download_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/coin-master-hack-version_GM406889139.pdf
    • http://pustaka.ust.ac.id/repository/roblox-free-robux-no-human-verification_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdf
    • http://pustaka.ust.ac.id/repository/how-to-make-a-gaming-website-for-free-like-roblox_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/get-robux-com_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/minecraft-free-app_GM479516143.pdf
    • http://pustaka.ust.ac.id/repository/free-robux-team-panda_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/free-roblox-accounts-2021_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/coin-master-cheats-for-free-spins_GM406889139.pdf
    • http://pustaka.ust.ac.id/repository/hacks-para-counter-blox-roblox-offensive_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/free-robux-codes-on-roblox_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/legit-coin-master-hack-october-2021_GM406889139.pdf
    • http://pustaka.ust.ac.id/repository/roblox-gift-card-generator-free_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/how-to-hack-a-private-server-roblox_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/roblox-strucid-aimbot-hack-2021-august_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031ad.bin
fe140166051b657df44791845baea31a41932740fd05ef229866b2639fd2f453		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31AD 22348 bytes
font_01_sfnt_off00006383.bin
5c02bb56675432e66784615869854fd4b76785cbe7a08ed3e0faa904a1a11c2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6383 19048 bytes

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