Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e3e7a8d501a7c49…

MALICIOUS

PDF

35.5 KB Created: 2021-07-06 03:28:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 696b5b141a519b9c1a1d009a7d442f0a SHA-1: 862af31ddec2114635ccff3c7f20bf7b56a38289 SHA-256: 1e3e7a8d501a7c49e28f854636550b00ccfe242a781210a09498786eb4ef64ea
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links disguised as hacks or guides for popular games like Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and the 'ML_NYX_PDF_MALICIOUS' score is very high, suggesting malicious intent. The document body and extracted URLs point towards a lure for free in-game currency, likely leading to phishing sites or malware downloads.

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.tw/app/431946152/how-to-get-free-robux-without-verifying-2021-game-hack
    • http://e-library.stienobel-indonesia.ac.id//repository/coins-master-hack_GM406889139.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/cm-free-spin-link-today_GM406889139.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/who-to-get-free-robux_GM431946152.pdf
    • http://e-library.stienobel-indonesia.ac.id/repository/link-for-free-coins-in-coin-master_GM406889139.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/free-coin-master-coins-and-spins_GM406889139.pdf
    • http://e-library.stienobel-indonesia.ac.id/repository/ways-to-earn-robux_GM431946152.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/free-spins-for-coin-master-that-work_GM406889139.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/free-clothing-on-roblox_GM431946152.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/how-can-i-get-free-robux_GM431946152.pdf
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-hacks-iphone_GM406889139.pdf
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-free-coins-link-2021-deutsch_GM406889139.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/robux-com-free-robux_GM431946152.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/coin-master-free-spins-cheats_GM406889139.pdf
    • http://e-library.stienobel-indonesia.ac.id/repository/pokemon-go-free-storage-upgrade_GM1094591345.pdf
    • http://e-library.stienobel-indonesia.ac.id/repository/get-free-robux-info_GM431946152.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdf
    • http://e-library.stienobel-indonesia.ac.id/repository/hack-master-coin_GM406889139.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/coin-master-reward-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030b5.bin
65c7d82a6371d77f84e7ca31adddb8000f22cb8d9d8e713fff7042eede372f36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30B5 22200 bytes
font_01_sfnt_off00006227.bin
da7d406aba47eea6317da3ede96973437af681d442b83efbb40dfbc95f86b21f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6227 20184 bytes

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