Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd86bb9428c54502…

MALICIOUS

PDF

43.3 KB Created: 2021-05-19 05:35:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8b9a49e007eb59611e8484b9cb62fda5 SHA-1: 72f9e849d3177c6ad0710cfe9ed8ae48566bef24 SHA-256: bd86bb9428c54502ccd0f4e9beb7937fabe86bb8925af5fcf0a6a3afb2597277
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external PDF files, many of which are hosted on the 'heddalboring.no' domain and appear to be part of a link farm designed to attract users searching for game-related cheats or currency. One embedded URI points to 'https://netcdn.xyz/app/1330123889/pubg-uc-xyz-game-hack', suggesting a direct download or exploit attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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 https://netcdn.xyz/app/1330123889/pubg-uc-xyz-game-hack
    • http://heddalboring.no/images/free-coins-coin-master-2021_GM406889139.pdf
    • http://heddalboring.no/images/minecraft-pocket-edition-mods-for-free_GM479516143.pdf
    • http://heddalboring.no/images/coin-master-free-coins-and-spins-daily_GM406889139.pdf
    • http://heddalboring.no/images/how-to-get-free-items-on-roblox_GM431946152.pdf
    • http://heddalboring.no/images/how-to-play-roblox-for-free_GM431946152.pdf
    • http://heddalboring.no/images/coin-master-free-spins-2021-haktuts_GM406889139.pdf
    • http://heddalboring.no/images/free-coins-coin-master-link-2021_GM406889139.pdf
    • http://heddalboring.no/images/free-coin-master-cards_GM406889139.pdf
    • http://heddalboring.no/images/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdf
    • http://heddalboring.no/images/free-robux-websites-that-work_GM431946152.pdf
    • http://heddalboring.no/images/free-coins-and-spins-coin-master_GM406889139.pdf
    • http://heddalboring.no/images/coin-master-free-spins-april-2021_GM406889139.pdf
    • http://heddalboring.no/images/hack-coin-pro-coin-master_GM406889139.pdf
    • http://heddalboring.no/images/where-can-i-get-free-spins-for-coin-master_GM406889139.pdf
    • http://heddalboring.no/images/robux-free-online_GM431946152.pdf
    • http://heddalboring.no/images/free-roblox-promo-codes-for-robux_GM431946152.pdf
    • http://heddalboring.no/images/free-coins-and-spins-in-coin-master_GM406889139.pdf
    • http://heddalboring.no/images/get-free-robux-2021_GM431946152.pdf
    • http://heddalboring.no/images/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdf
    • http://heddalboring.no/images/roblox-free-clothes-generator_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000044a5.bin
3a119bfd6b693f8c11586a6c056aa0d408171e1c95c561810ebecf4071ca91e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x44A5 25012 bytes
font_01_sfnt_off00007c55.bin
214f0b8c2b3c279476f862ae08d7e072944da5f6084cbd6130f0ffdc3460b614
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C55 2816 bytes
font_02_sfnt_off00008601.bin
423ecd63b958ef947e97c62cafb429c5458f8a0e1c704477fc405d9429ff56f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8601 18388 bytes