Malicious PDF — malware analysis report

Static analysis result for SHA-256 193a84edcf110c5c…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 01:29:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 59b69af959723a41f11905f5e433c8fd SHA-1: 1ab87e50ba2992fdeb195e6fcfecec046f9aaecd SHA-256: 193a84edcf110c5c89b5b8fbb0b6342ebb932b5932311a44dfc68f31c9d62eb8
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which appear to be SEO-optimized and lead to pages related to game hacks and cheats. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous links suggests a link farm or a distribution point for malicious content. The document body, though partially corrupted, contains URLs that align with the heuristic findings, indicating a likely attempt to direct users to potentially harmful sites.

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/406889139/pig-master-coin-master-free-spin-game-hack
    • http://pustaka-smpn3tpi.com/repository/how-do-you-hack-for-cases-in-cbro-roblox_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/free-t-shirt-deacls-roblox_GM431946152.pdf
    • http://pustaka-smpn3tpi.com//repository/coin-master-invite-friends-hack_GM406889139.pdf
    • http://pustaka-smpn3tpi.com//repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://pustaka-smpn3tpi.com//repository/demon-roblox_GM431946152.pdf
    • http://pustaka-smpn3tpi.com//repository/coin-master-cheats-2021_GM406889139.pdf
    • http://pustaka-smpn3tpi.com//repository/roblox-games-with-free-boombox_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/free-robux-generator-without-verification_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/get-free-roblox_GM431946152.pdf
    • http://pustaka-smpn3tpi.com//repository/coin-master-free-spins-2021-no-human-verification_GM406889139.pdf
    • http://pustaka-smpn3tpi.com/repository/free-robux-every-day_GM431946152.pdf
    • http://pustaka-smpn3tpi.com//repository/free-spins-coin-master-apple_GM406889139.pdf
    • http://pustaka-smpn3tpi.com/repository/roblox-why-does-hacking-kick-you-from-server_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/roblox-apk-mod-hack-download_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/roblox-case-clciker-hack_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/free-roebucks_GM431946152.pdf
    • http://pustaka-smpn3tpi.com//repository/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdf
    • http://pustaka-smpn3tpi.com/repository/google-moon-active_GM406889139.pdf
    • http://pustaka-smpn3tpi.com//repository/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • http://pustaka-smpn3tpi.com//repository/coin-master-free-blogspot_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f9a.bin
b93fd46bff4399dc62e550ccd5728a4c8d6daceb2250ad4b6be3b709614889f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x2F9A 22844 bytes
font_01_sfnt_off000062e8.bin
7fc6a102d94eb6ecd4fce1d81166f8bf1d44e62dd1c3248b5361d895f7f4d4be
pdf-font-stream PDF embedded font (sfnt) at offset 0x62E8 18328 bytes