Malicious PDF — malware analysis report

Static analysis result for SHA-256 a36d94f7cbbc604b…

MALICIOUS

PDF

41.9 KB Created: 2021-05-17 20:58:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 01b02e8eaabc722be88a400af27997e9 SHA-1: 728afb8e5747333cc674ba1ed04ccb84c2d1d29f SHA-256: a36d94f7cbbc604b22446afb16be22cbd327ab701875edc72b4178b979478ad1
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, forming a link farm that directs users to various game-related hack pages. The primary URL, 'https://netcdn.xyz/app/431946152/rbxdemon-game-hack', suggests a lure for game cheats. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, many of which are SEO-optimized PDF documents, further supporting the malicious intent of directing users to potentially harmful content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/431946152/rbxdemon-game-hack
    • http://shiny-nn.ru/images/who-to-get-free-robux_GM431946152.pdf
    • http://shiny-nn.ru/images/coin-master-link-daily-get-free-spins-amp_GM406889139.pdf
    • http://shiny-nn.ru/images/coin-master-online-hack-download_GM406889139.pdf
    • http://shiny-nn.ru/images/free-games-like-coin-master_GM406889139.pdf
    • http://shiny-nn.ru/images/coin-master-cards_GM406889139.pdf
    • http://shiny-nn.ru/images/is-there-an-actual-hack-that-work-for-coin-master_GM406889139.pdf
    • http://shiny-nn.ru/images/free-robux-link_GM431946152.pdf
    • http://shiny-nn.ru/images/coin-master-hack-no-survey-or-verification_GM406889139.pdf
    • http://shiny-nn.ru/images/coin-master-hack-no-survey_GM406889139.pdf
    • http://shiny-nn.ru/images/online-hacking-tricks-coin-master_GM406889139.pdf
    • http://shiny-nn.ru/images/coin-master-fan-page-free-spins_GM406889139.pdf
    • http://shiny-nn.ru/images/coin-master-free-coins-link-march-2021_GM406889139.pdf
    • http://shiny-nn.ru/images/cm-spin-link_GM406889139.pdf
    • http://shiny-nn.ru/images/free-spins-coin-master-march-2021_GM406889139.pdf
    • http://shiny-nn.ru/images/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdf
    • http://shiny-nn.ru/images/robux-hack-generator_GM431946152.pdf
    • http://shiny-nn.ru/images/blox-supply-free-robux_GM431946152.pdf
    • http://shiny-nn.ru/images/free-robux-gift-card-codes-2021_GM431946152.pdf
    • http://shiny-nn.ru/images/coin-master-free-daily-spins-link_GM406889139.pdf
    • http://shiny-nn.ru/images/robux-free-c_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004981.bin
b97f1407e49ca1add513ee5878ddc87bb506f54fee7c3de8035532c6b57ba145
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4981 24456 bytes
font_01_sfnt_off000081c7.bin
84e994ea3e0766e4b6b44f1efc08852f1b1b6721f581ba32b946cb803bfb180d
pdf-font-stream PDF embedded font (sfnt) at offset 0x81C7 18144 bytes