Malicious PDF — malware analysis report

Static analysis result for SHA-256 85778be072556125…

MALICIOUS

PDF

34.0 KB Created: 2021-07-04 13:37:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 99c26e795877611763ec2918087f81a5 SHA-1: c8f01553b3878a3ff3f81836af419f63760fb584 SHA-256: 85778be072556125ba8cba0e4cbdb4b184dabaeb0a046ba6d106e5b54ada4216
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 SEO-optimized pages offering game hacks and cheats for popular games like Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a coordinated effort to direct users to potentially malicious download sites. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt.

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/roblox-free-printables-game-hack
    • http://slim.sisminkada.net/repository/hack-para-roblox-youtube_GM431946152.pdf
    • http://slim.sisminkada.net/repository/roblox-arsenal-hacks-download_GM431946152.pdf
    • http://slim.sisminkada.net/repository/how-to-get-free-robux_GM431946152.pdf
    • http://slim.sisminkada.net/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdf
    • http://slim.sisminkada.net/repository/roblox-hack-apk-android-oyun-club_GM431946152.pdf
    • http://slim.sisminkada.net/repository/how-to-get-free-robux-dount-shop_GM431946152.pdf
    • http://slim.sisminkada.net/repository/roblox-when-will-bloxburg-be-free_GM431946152.pdf
    • http://slim.sisminkada.net/repository/free-robux-no-password-or-email_GM431946152.pdf
    • http://slim.sisminkada.net/repository/coin-master-hack-without-verification-code_GM406889139.pdf
    • http://slim.sisminkada.net/repository/roblox-synapse-cheat-script_GM431946152.pdf
    • http://slim.sisminkada.net/repository/free-robux-no-downloading-apps_GM431946152.pdf
    • http://slim.sisminkada.net/repository/arsenal-hacks-roblox_GM431946152.pdf
    • http://slim.sisminkada.net/repository/roblox-cheats-like-rcm_GM431946152.pdf
    • http://slim.sisminkada.net/repository/roblox-mod-apk-free-download_GM431946152.pdf
    • http://slim.sisminkada.net/repository/multi-tool-hack-roblox_GM431946152.pdf
    • http://slim.sisminkada.net/repository/como-usar-tesla-roblox-hack_GM431946152.pdf
    • http://slim.sisminkada.net/repository/how-to-get-free-robux-com_GM431946152.pdf
    • http://slim.sisminkada.net/repository/how-to-get-free-robux-for-kids_GM431946152.pdf
    • http://slim.sisminkada.net/repository/coin-master-game-free-play-online_GM406889139.pdf
    • http://slim.sisminkada.net/repository/coin-master-free-daily-spins-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003143.bin
39f07893be2fac1ce226553ec5c2e6b18faa800402f651f64d3c503fd62c2758		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3143 21420 bytes
font_01_sfnt_off00005fd8.bin
ad7b98b6c4c92f588d5c4596e7e9a65ea7f2730b67aeb24bb8301345df065d3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD8 19028 bytes

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