Malicious PDF — malware analysis report

Static analysis result for SHA-256 280b508e35f0f3f1…

MALICIOUS

PDF

35.6 KB Created: 2021-06-30 02:52:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 78b771c9c1d24b2c9b248c6c0ec74904 SHA-1: 2bdde1b51f369d624525b50311d68b664dbedbc6 SHA-256: 280b508e35f0f3f1b7dcbed3c077551f035e9c1f2973b507b496f6fb908da069
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains numerous links to external resources, many of which are hosted on a domain that appears to be part of a link farm designed to attract users searching for game cheats and exploits. The primary URL, http://netcdn.co/app/431946152/belly-button-roblox-free-game-hack, suggests a download lure for a malicious application. The ML classifier also strongly indicated maliciousness.

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/belly-button-roblox-free-game-hack
    • https://repository.stikesindramayu.ac.id/repository/free-robux-sites-that-work_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-codes-for-assassin-roblox_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/mistplay-hack-robux_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-robux-giveaway-live_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/roblox-naruto-final-bond-cheat-lev-up_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/roblox-royale-high-school-diamond-hack_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/robux-hacks-2021_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-free-robux-codes-2021_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/how-to-hack-100-type-in-roblox_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-free-robux-with-inspect-element-2021_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/roblox-account-free-hack_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/roblox-hack-eploit-jailbreak_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-free-robux-by-just-watching-a-video_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/glitch-to-get-free-robux-2021_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/roblox-free-unlimited-robux-glitch_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/hack-robux-facile-fr_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-spins-coin-master-hack_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/use-cheat-engine-by-roblox_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-coin-master-hacks-no-verification_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/roblox-exploit-download_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003322.bin
736105e6d3dfd7f18ae6d79e9cfa83d787d8cf979d24940fa14592fddf8e614e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3322 22496 bytes
font_01_sfnt_off000065da.bin
35031fdb80565eb839718433e7a3d8f9e21acdacef953afc102294402ab11fa9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65DA 19072 bytes

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