Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb0e12ac8a51c228…

MALICIOUS

PDF

50.8 KB Created: 2021-06-08 14:02:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b83817b3d937e6a06ef003351ac1e9df SHA-1: d7f80669153e595de01af2d3948009ac0ec2caca SHA-256: bb0e12ac8a51c228866a202ca04f996fcdb7b340e1a01772cb0d42bd8199d445
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm of SEO-optimized PDF documents, likely intended to lure users into downloading malicious content related to popular games. The presence of external URIs and a high ML classifier score indicate malicious intent. While no scripts were directly extracted, the structure suggests a potential for JavaScript execution or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9861

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/roblox-survive-and-kill-the-killers-in-area-51-free--game-hack
    • http://www.sfakia-online.com/images/robux-redeem_GM431946152.pdf
    • http://www.sfakia-online.com/images/coin-master-free-spins-coins_GM406889139.pdf
    • http://www.sfakia-online.com/images/can-you-play-minecraft-for-free_GM479516143.pdf
    • http://www.sfakia-online.com/images/what-are-points-for-in-roblox_GM431946152.pdf
    • http://www.sfakia-online.com/images/google-how-do-you-get-free-robux_GM431946152.pdf
    • http://www.sfakia-online.com/images/robux-builders-club-hack_GM431946152.pdf
    • http://www.sfakia-online.com/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdf
    • http://www.sfakia-online.com/images/coin-master-free-spins-and-coins-blogspot_GM406889139.pdf
    • http://www.sfakia-online.com/images/free-minecraft-windows-10-with-java_GM479516143.pdf
    • http://www.sfakia-online.com/images/roblox-redeem-card-codes-free_GM431946152.pdf
    • http://www.sfakia-online.com/images/how-to-hack-roblox-accounts_GM431946152.pdf
    • http://www.sfakia-online.com/images/coin-master-70-spin-link-today_GM406889139.pdf
    • http://www.sfakia-online.com/images/coin-master-free-cards_GM406889139.pdf
    • http://www.sfakia-online.com/images/how-do-i-get-free-spins-on-coin-master_GM406889139.pdf
    • http://www.sfakia-online.com/images/moonactive-free-spins_GM406889139.pdf
    • http://www.sfakia-online.com/images/how-to-hack-roblox-jailbreak_GM431946152.pdf
    • http://www.sfakia-online.com/images/free-robux-codes-generator-no-verification_GM431946152.pdf
    • http://www.sfakia-online.com/images/coin-master-hack-september-2021_GM406889139.pdf
    • http://www.sfakia-online.com/images/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdf
    • http://www.sfakia-online.com/images/how-to-get-more-free-coins-on-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005639.bin
8c316e8c6edbfe70a3df5f194a82414e7ba77662777f38a2ad6805d35a1241ad
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5639 33364 bytes
font_01_sfnt_off0000a21d.bin
68d5c43dd35ebce7b57db6f28e44490340f141f9cf2c17546d771acddbbe7359
pdf-font-stream PDF embedded font (sfnt) at offset 0xA21D 19128 bytes