Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c50b12d0fc811e6…

MALICIOUS

PDF

36.6 KB Created: 2021-07-04 13:35:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3853870dbfd5bc9374045651eec86183 SHA-1: 8cd83d489ffff057187855a191f83006612541d4 SHA-256: 6c50b12d0fc811e61695993a85123fbc61ca3bcc8956e4039d079013bf1fbe0c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on domains related to free Robux or game hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to direct users to potentially harmful content. The ML classifier also strongly flagged this PDF as malicious.

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-having-to-download-anything-game-hack
    • http://digilib.ulm.ac.id/pusat/repository/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/exploit-hack-roblox-free-download_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/cool-roblox-shirts-free-shipping_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/roblox-how-to-get-an-invisible-head-for-free_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/minecraft-java-free_GM479516143.pdf
    • http://digilib.ulm.ac.id/pusat/repository/hack-mad-paintball-roblox_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/gideon-the-streets-roblox-hack_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-hacks-iphone_GM406889139.pdf
    • http://digilib.ulm.ac.id/pusat/repository/code-free-robux_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/fire-gg-free-robux_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/roblox-star-wars-hack-v3rmillion_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/how-do-you-get-free-robux-without-pastibein-raw_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-robux_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-no-scam-or-hack_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/roblox-generator-no-human-verification_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-spins-link-2021-download_GM406889139.pdf
    • http://digilib.ulm.ac.id/pusat/repository/roblox-booga-booga-auto-farm-hack-afk-farm-working-2021_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-generator-2021-no-human-verification_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/free-roblox-adopt-me-accounts_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/roblox-greenwood-town-how-to-get-free-deathbringer_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033a1.bin
cd50fe6857ff900382eb0e031e3f6742b1810c6a56fa3b1d362213fc579de2f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33A1 23084 bytes
font_01_sfnt_off00006773.bin
feaa653c4b028b5238d7132d8ae06583c816fed9bc305b0c10c23b24cb3557b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6773 19992 bytes

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