Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4198feda1ebc84c…

MALICIOUS

PDF

47.6 KB Created: 2021-05-16 10:46:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 397f2b9260a360ef78ddb346262c4c18 SHA-1: d47d8f03e2d109621b22dc3746530b2796b51707 SHA-256: c4198feda1ebc84c32e1204cda2102d3a8bd1059a9e46c626ec956cf52a20468
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, including one pointing to 'give-me-free-robux-game-hack', and a link farm of 28 external PDF links. These links likely lead to malicious websites designed to trick users into downloading malware or providing personal information. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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/give-me-free-robux-game-hack
    • http://oceanos.pl/images/free-coins-coin-master-link_GM406889139.pdf
    • http://oceanos.pl/images/www-free-robux-com_GM431946152.pdf
    • http://oceanos.pl/images/minecraft-pe-apk-free-download_GM479516143.pdf
    • http://oceanos.pl/images/free-robux-generator-com-roblox-hack_GM431946152.pdf
    • http://oceanos.pl/images/free-robux-no-scam_GM431946152.pdf
    • http://oceanos.pl/images/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdf
    • http://oceanos.pl/images/free-gold-cards-coin-master_GM406889139.pdf
    • http://oceanos.pl/images/download-hacked-games-com-coin-master_GM406889139.pdf
    • http://oceanos.pl/images/free-robux-app_GM431946152.pdf
    • http://oceanos.pl/images/free-spin-hack-coin-master-2021_GM406889139.pdf
    • http://oceanos.pl/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdf
    • http://oceanos.pl/images/how-to-get-free-robux-easy-no-download_GM431946152.pdf
    • http://oceanos.pl/images/coin-master-pro-hack_GM406889139.pdf
    • http://oceanos.pl/images/roblox-free-robux-generator_GM431946152.pdf
    • http://oceanos.pl/images/coin-master-claim-free-spins_GM406889139.pdf
    • http://oceanos.pl/images/free-private-minecraft-server_GM479516143.pdf
    • http://oceanos.pl/images/free-coins-coin-master-blog_GM406889139.pdf
    • http://oceanos.pl/images/free-robux-hack_GM431946152.pdf
    • http://oceanos.pl/images/how-to-get-spins-for-free-on-coin-master_GM406889139.pdf
    • http://oceanos.pl/images/coin-master-free-link-today_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004797.bin
d57a1a1b414e97fb8ebafd3ca5051c32355ccae4ee29a502f05f77131aa76d68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4797 36360 bytes
font_01_sfnt_off00009786.bin
68319dbf483afe81c5a4de3b3f5290fc223d358c0f75f000dd988daf46eb7eae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9786 18444 bytes

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