Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b92cc393ca5aaed…

MALICIOUS

PDF

34.0 KB Created: 2021-06-19 20:01:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4d98146033b4fafdaefa89919d7b63d8 SHA-1: a8323b499cec1cb8ca8fb6b697ee149aa3bc5c68 SHA-256: 3b92cc393ca5aaed3fb37e38e7094b741ad7ec648fc31fa7efcd55047152d449
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external resources, many of which are hosted on a domain associated with game cheats and free currency. The ML classifier strongly indicated maliciousness, and the presence of a download button lure reinforces the deceptive nature of the document. The primary goal appears to be directing users to download or access potentially harmful 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/w-to-get-free-robux-game-hack
    • https://repository.stikesindramayu.ac.id/repository/pubg-uc-bc-com_GM1330123889.pdf
    • https://repository.stikesindramayu.ac.id/repository/twitter-coin-master-free-spins-link_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-show-rules-for-free-robux-on-roblox_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/roblox-how-to-get-free-gamepass_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-free-plus-on-meep-city-roblox-2021_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/cheat-roblox-tire-dans-les-mur-sur-phantom-forces_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/minecraft-education-edition-free-download_GM479516143.pdf
    • https://repository.stikesindramayu.ac.id/repository/robux-gratis-hack-descargar_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/google-play-coin-master-free-spins_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/script-hack-roblox-magnet-simulator-inf-pets-stats_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/roblox-booga-booga-hack_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/roblox-free-exploit-download_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/google-coin-master-free-spins_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-spins-coin-master-twitter_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/roblox-studio-free-robux_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/roblox-free-catalog-things_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/roblox-free-pets_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000303e.bin
f68c0dd08bec58ba140b747a29c01fcf96938c1bce4aacea4738f96c7f41013a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x303E 21628 bytes
font_01_sfnt_off00005fc5.bin
a65f531caa7ba114f6f63e6554ec69baf1c5eb6ec7578f5183560c83b64f4ac6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC5 19020 bytes

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