Malicious PDF — malware analysis report

Static analysis result for SHA-256 caabcc3efd4510e1…

MALICIOUS

PDF

34.8 KB Created: 2021-06-20 00:12:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 82e3fff94fde6660f891d892a47aec6d SHA-1: 4dabca01115752c3b80fab94df8d5614703311ef SHA-256: caabcc3efd4510e18c989bcd13a87190c213fd09da42f3141389a9863f415cb6
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a link farm, suggesting it is designed to redirect users to external sites. The document body and heuristic firings indicate a lure for game-related hacks and generators, likely leading to malware downloads or phishing. The ML classifier strongly supports the malicious nature of this PDF.

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/free-avater-maker-roblox-game-hack
    • http://www.perpustakaan.unda.ac.id//repository/robux-claimer_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id//repository/hacks-minecraft_GM479516143.pdf
    • http://www.perpustakaan.unda.ac.id/repository/cute-free-stuff-on-roblox_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/how-to-hack-on-roblox-saber-wars_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id//repository/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/roblox-email-en-cas-de-hack_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/robux-hack-no-verification_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/minecraft-bedrock-edition-pc-free_GM479516143.pdf
    • http://www.perpustakaan.unda.ac.id/repository/free-promo-codes-in-roblox-2021_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-free-robux-without-paying_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id//repository/roblox-got-talent-piano-hack_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-roblox-credit-for-free_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/hacking-is-bad-roblox-id_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/free-spins-and-coins-com_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id/repository/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-100-robux-for-free_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id//repository/www-rbxhut-com_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030cb.bin
d8e8002630179acec64c79c40d7c4777b9189a71bd846e20365a2e6909f7188e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30CB 22192 bytes
font_01_sfnt_off0000623b.bin
f340a89177e70a182d4878119e40727ba4d44aaef69c44b6c82a63fd850c30e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x623B 19236 bytes

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