Malicious PDF — malware analysis report

Static analysis result for SHA-256 1df47ed88821c0db…

MALICIOUS

PDF

53.5 KB Created: 2021-06-09 04:30:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 89590aeca399f41fcf37365594b1e65f SHA-1: be84545ada1faaf000f33e1a4be97151c3eb7e35 SHA-256: 1df47ed88821c0db468721dbb7557c16dcab139cbe51ca6d7123baba5d9045d5
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a prominent external URI, all pointing to sites offering game-related cheats and generators. The heuristic firings indicate a link farm designed to direct users to other PDF documents, likely for malicious purposes such as phishing or malware distribution. The ML classifier strongly suggests maliciousness, and the presence of multiple external links supports a social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9616

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.tw/app/431946152/free-robux-generator-no-survey-youtube-game-hack
    • http://shiny-nn.ru/images/install-free-game-coin-master_GM406889139.pdf
    • http://shiny-nn.ru/images/coin-master-online-free-spin_GM406889139.pdf
    • http://shiny-nn.ru/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdf
    • http://shiny-nn.ru/images/free-robux-roblox-promo-codes_GM431946152.pdf
    • http://shiny-nn.ru/images/roblox-robux-hack-cheat-engine-64_GM431946152.pdf
    • http://shiny-nn.ru/images/pokemon-go-free-7km-eggs-july-2021_GM1094591345.pdf
    • http://shiny-nn.ru/images/free-custom-minecraft-skins_GM479516143.pdf
    • http://shiny-nn.ru/images/sites-to-get-free-robux_GM431946152.pdf
    • http://shiny-nn.ru/images/real-robux_GM431946152.pdf
    • http://shiny-nn.ru/images/how-to-get-free-robux-website_GM431946152.pdf
    • http://shiny-nn.ru/images/free-robux-hack-us_GM431946152.pdf
    • http://shiny-nn.ru/images/coin-master-fan-page-giveaway_GM406889139.pdf
    • http://shiny-nn.ru/images/safe-hack-for-coin-master-android_GM406889139.pdf
    • http://shiny-nn.ru/images/why-is-tiktok-free_GM835599320.pdf
    • http://shiny-nn.ru/images/hack-coins-in-coin-master_GM406889139.pdf
    • http://shiny-nn.ru/images/coin-master-hack-online-cheat_GM406889139.pdf
    • http://shiny-nn.ru/images/freer-pro-tiktok-fans_GM835599320.pdf
    • http://shiny-nn.ru/images/coin-master-links-free-spins_GM406889139.pdf
    • http://shiny-nn.ru/images/coin-master-hack-fast_GM406889139.pdf
    • http://shiny-nn.ru/images/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005470.bin
ab54971ee4aecae0254cc338df6c1ba1f85860645f3337d75cdcc9c31605abdd
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5470 26520 bytes
font_01_sfnt_off00009238.bin
7ebedd6b182173c8e55836cb0d114b2c4a0ac85c96a51b9f0706c935f8415fea
pdf-font-stream PDF embedded font (sfnt) at offset 0x9238 8252 bytes
font_02_sfnt_off0000ad4d.bin
410a7356168912520f1d3bbe3b269083de38a72415542754dbf53fb2dc6266d1
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD4D 18804 bytes