Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe16565ff6fed604…

MALICIOUS

PDF

34.4 KB Created: 2021-06-20 01:36:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2dc4c8cdd15b0301333c912d29855f23 SHA-1: af79c08433637a0675b460cb4d49bdce1908c065 SHA-256: fe16565ff6fed604cb8315714d6d8d78367b3b643252e9111ab539728aabcf08
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous embedded URLs and a heuristic firing for a 'PDF_SEO_LINK_FARM', indicating a large number of links designed to attract users with promises of game hacks and cheats. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic further suggests a deceptive user interface aimed at tricking users into downloading further content.

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.co/app/431946152/roblox-change-username-hack-game-hack
    • http://library.sdkmaterdei.sch.id/repository/minecraft-java-free-download_GM479516143.pdf
    • http://library.sdkmaterdei.sch.id/repository/ccv5-roblox-dbfp-hack-tuto-2021_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/roblox-hack-accounts-online_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/how-to-hack-roblox-accounts-online_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/earn-your-free-rank-roblox-meme_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/code-robux-free_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/roblox-hack-for-robux-free-2021_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/how-to-get-hacks-on-roblox-phantom-forces_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/roblox-how-to-be-copletely-white-free_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/why-you-never-want-to-use-free-robux_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/hack-para-dragon-ball-rage-2021-roblox_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/hacks-roblox_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/doodle-jump-free-roblox_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/how-to-look-cute-on-roblox-for-free_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/earn-free-robux-today_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/you-promised-my-son-free-robux_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/home-roblox-hack_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/clothing-advertisement-roblox-template-free_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdf
    • http://library.sdkmaterdei.sch.id/repository/new-hack-work-100-roblox-deathrun-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000312b.bin
cffa1c4ae39ae70e92961e5fba075c0c9d3d83c6d150d6fe15c94f08983f02d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x312B 21964 bytes
font_01_sfnt_off00006185.bin
f6b46671b9a0c1c99a0cbb82d0cda99a5f668862eaad9886a712bcaaeb5e0b4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6185 19084 bytes