Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad2a254b00e42c38…

MALICIOUS

PDF

46.0 KB Created: 2021-06-03 12:37:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 879578688eefa48b5aadce07c4cd4a1b SHA-1: 58cff5af279232ce2cf90e1181c256d79c3b29db SHA-256: ad2a254b00e42c381e328e5bcc5607efb356155badf50ea1e41772c92222d4e0
102 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which appear to be part of a link farm or SEO manipulation scheme, as indicated by the PDF_SEO_LINK_FARM heuristic. One prominent URL, 'https://netcdn.online/app/431946152/free-roblox-characters-game-hack', suggests a lure related to game hacks. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic further supports the idea that the document is designed to trick users into clicking and downloading content. The ML_NYX_PDF_MALICIOUS classifier strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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.online/app/431946152/free-roblox-characters-game-hack
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/is-there-a-way-to-get-free-robux_GM431946152.pdf
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/pubg-uc-deducted_GM1330123889.pdf
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-daily_GM406889139.pdf
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-spin-link-today-2021_GM406889139.pdf
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/robux-robux_GM431946152.pdf
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/free-coin-master-spins-2021-link_GM406889139.pdf
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/www-robux_GM431946152.pdf
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/como-hackear-coin-master-gratis_GM406889139.pdf
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/free-robux-no-verification-no-survey_GM431946152.pdf
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/how-to-change-your-roblox-username-for-free_GM431946152.pdf
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/minecraft-sign-up-free_GM479516143.pdf
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/free-card-link-coin-master_GM406889139.pdf
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/500-free-coin-master-spins_GM406889139.pdf
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/how-to-get-free-clothes-on-roblox_GM431946152.pdf
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/free-robux-generator-no-survey_GM431946152.pdf
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/haktuts-coin-master-free-spin-link_GM406889139.pdf
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-hack-spins-free_GM406889139.pdf
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/hack-coin-master-ios-download_GM406889139.pdf
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/hackear-coin-master-sin-root_GM406889139.pdf
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/how-to-hack-coin-master_GM406889139.pdf
    • http://wolfzscripts
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050c5.bin
af826b22df7585d023b9057bfedf1511075908ed48dbec77cd23be3a2b1b283e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50C5 23616 bytes
font_01_sfnt_off00008654.bin
f2ef90dc1d4b7d566a925914dce80e1208cabb088f8379c7ecbf722370c5b14a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8654 2872 bytes
font_02_sfnt_off00009031.bin
0263947262242f4b31913ad3d0f55b2be151042c00d915c510b843208e81fc00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9031 18448 bytes

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