Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f5d5a996848ec45…

MALICIOUS

PDF

44.0 KB Created: 2021-05-13 15:16:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: af1beafb4b10a26ec9357e06f0ab2f4e SHA-1: 09077246a587d65f032dd3886f0058fe72febf0c SHA-256: 1f5d5a996848ec45aa9c9c71a44ab38076f91e81c2e798fe4226fd83ebf9c4a2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF document contains numerous external links, many of which point to other PDF files hosted on a subdomain, suggesting a link farm designed to attract users searching for game hacks and cheats. The presence of a download button lure and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.xyz/app/479516143/minecraft-free-minecraft-game-hack
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdf
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/coin-master-hack-spins-download_GM406889139.pdf
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/how-to-hack-roblox-jailbreak_GM431946152.pdf
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/hacks-for-coin-master-game_GM406889139.pdf
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/coin-master-daily-free-spins-link-app-download_GM406889139.pdf
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/free-coin-spin-daily-link-coin-master_GM406889139.pdf
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/coin-master-hack-progamers_GM406889139.pdf
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/free-roblox-money_GM431946152.pdf
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/roblox-e-free_GM431946152.pdf
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/free-robux-generator-codes_GM431946152.pdf
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/free-spins-coin-master-hack_GM406889139.pdf
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/how-to-get-100-robux-for-free_GM431946152.pdf
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/chisel-and-bits-mod-pe_GM479516143.pdf
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/coin-master-attack-madness-hack_GM406889139.pdf
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/minecraft-education-edition-free_GM479516143.pdf
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/cmaster-club-coin-master-hack_GM406889139.pdf
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/free-2021-robux_GM431946152.pdf
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/coin-master-free-spins-and-coins-hack_GM406889139.pdf
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/minecraft-pe-hacks_GM479516143.pdf
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/how-to-change-your-name-on-roblox-for-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d4b.bin
4f93ba1351e14f5d8f806f6bdcfd91c0fd314d788b5e7549be836c9e2b6c2f44		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D4B 28892 bytes
font_01_sfnt_off00008c1b.bin
2778e064ee8e4e3a4bd3984a17bb7eaaeefaa41a67eb131b8ade69fe1653bbfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C1B 17568 bytes

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