Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0489b1150821ab1…

MALICIOUS

PDF

44.2 KB Created: 2021-06-03 11:27:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 975b90d7610db3954fa803958563fef6 SHA-1: 3d073276b3c9d89b506065403b8f42657cdb62bd SHA-256: c0489b1150821ab18c76ff8c238a6e61e66097f371ec797081fc6f2bf6585041
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which point to SEO-optimized PDF files designed to attract users searching for game-related cheats and currency. The presence of a download button lure and a high ML classifier score strongly indicate malicious intent. The primary URL suggests a download for a game hack, likely leading to a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/robuxy-com-free-robux-game-hack
    • http://perpus.ar-rum.ac.id//repository/coin-master-free-spin-app-2021_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/op-rewards-free-robux_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/coin-master-hack-without-human-verification-2021_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/how-to-get-free-snacks-on-coin-master_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/coin-master-free-spins-apk_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/free-coin-and-spin-in-coin-master_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/free-spin-coin-master-game_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/coin-master-hacker-club_GM406889139.pdf
    • http://perpus.ar-rum.ac.id/repository/today-free-spin-coin-master_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/how-to-get-roblox-credit-for-free_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/daily-coin-master-spins_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/coin-master-hack-tool-without-verification_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/roblox-lovenet_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/free-roblox-toy-codes-not-used_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/robux-survey_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/tryrbx-site-free-robux_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/pubg-uc-2021_GM1330123889.pdf
    • http://perpus.ar-rum.ac.id//repository/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdf
    • http://perpus.ar-rum.ac.id//repository/minecraft-xbox-360-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051c8.bin
e082cda6f0165da4eb9b891ed5843c27387dd8536fcb45ffd6b97659df3e7128		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51C8 24524 bytes
font_01_sfnt_off00008994.bin
502ad6067225007cfeab5155f8ca615546b56d7ab4478b734f537abd02c25d18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8994 18452 bytes

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