Malicious PDF — malware analysis report

Static analysis result for SHA-256 df43185e82e4689b…

MALICIOUS

PDF

34.5 KB Created: 2021-06-29 08:25:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 067aec2edbddcba4e790bf3708fee430 SHA-1: c689d0385666456ea60e569510d75b1c0099048f SHA-256: df43185e82e4689ba523b1bf06c528b53da6e5acdc99761409e47b26fa13e9d6
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are structured as SEO-optimized links to game-related content like 'free robux' and 'promo codes'. The presence of a 'download button' lure and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites or downloads. The document's content and structure strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

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-roblox-clothes-promo-codes-game-hack
    • http://perpustakaan.ftk.uinib.ac.id/repository/fre-sha-vaca-do-roblox-id_GM431946152.pdf
    • http://perpustakaan.ftk.uinib.ac.id//repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdf
    • http://perpustakaan.ftk.uinib.ac.id/repository/how-to-get-free-robux-on-roblox-in-2021_GM431946152.pdf
    • http://perpustakaan.ftk.uinib.ac.id//repository/get-free-robux-generator_GM431946152.pdf
    • http://perpustakaan.ftk.uinib.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://perpustakaan.ftk.uinib.ac.id/repository/minecraft-pocket-apk_GM479516143.pdf
    • http://perpustakaan.ftk.uinib.ac.id/repository/coin-master-hacks-free-spins_GM406889139.pdf
    • http://perpustakaan.ftk.uinib.ac.id/repository/free-robux-safe_GM431946152.pdf
    • http://perpustakaan.ftk.uinib.ac.id/repository/10-free-spins-coin-master_GM406889139.pdf
    • http://perpustakaan.ftk.uinib.ac.id//repository/free-robux-hack-us_GM431946152.pdf
    • http://perpustakaan.ftk.uinib.ac.id//repository/coin-master-free-spin-link-app_GM406889139.pdf
    • http://perpustakaan.ftk.uinib.ac.id//repository/www-free-robux_GM431946152.pdf
    • http://perpustakaan.ftk.uinib.ac.id/repository/cool-free-roblox-charecters-uu_GM431946152.pdf
    • http://perpustakaan.ftk.uinib.ac.id/repository/get-2021-free-spins-on-coin-master_GM406889139.pdf
    • http://perpustakaan.ftk.uinib.ac.id/repository/free-rhs-codes-roblox_GM431946152.pdf
    • http://perpustakaan.ftk.uinib.ac.id/repository/coin-master-free-spins-coins_GM406889139.pdf
    • http://perpustakaan.ftk.uinib.ac.id/repository/hack-to-join-flamingo-in-roblox_GM431946152.pdf
    • http://perpustakaan.ftk.uinib.ac.id/repository/free-roblox-accounts-with-robux-2021-that-work_GM431946152.pdf
    • http://perpustakaan.ftk.uinib.ac.id//repository/coin-master-hack-cheat-engine_GM406889139.pdf
    • http://perpustakaan.ftk.uinib.ac.id/repository/coin-master-free-spins-link-today-blogspot_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e2c.bin
c23bb3fa469c1a1f2e5a186fd7552ed62bbf3a5b43545730a6b65b6feaee6fe5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E2C 22516 bytes
font_01_sfnt_off00006061.bin
50cb8a3576e2966c1d52e43cb50a14147fbdf78f1a94ab369d311003f1eb71be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6061 19508 bytes

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