Malicious PDF — malware analysis report

Static analysis result for SHA-256 e537fd010290ac23…

MALICIOUS

PDF

34.0 KB Created: 2021-06-19 17:22:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d05c77220f99a4da25ddccf6b2406e1b SHA-1: d29bdcc7ff1051a6b9c0f5f0e4c197a22169d45e SHA-256: e537fd010290ac23d32344535d22010ccf825d181b29d34c05a9b4e23a26a52a
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 are presented as download lures for game hacks and cheats. The ML classifier and the PDF_SEO_LINK_FARM heuristic strongly indicate malicious intent, likely to direct users to sites hosting malware or engaging in scams. The presence of a 'download button' lure further supports this conclusion.

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/dragon-ball-roblox-hack-game-hack
    • http://perpustakaan.stikeshamzar.ac.id/repository/free-robux-images_GM431946152.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/free-robux-without-downloading-apps_GM431946152.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/coin-master-twitter-free-spins_GM406889139.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/robux-hack-no-human-verification-no-survey-no-download_GM431946152.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/download-roblox-cheat-engine-55-for-free_GM431946152.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/hack-coin-master-spin-android_GM406889139.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/coin-master-daily-free-spin-app_GM406889139.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/old-roblox-accounts-for-free_GM431946152.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/free-robux-giveaway-2021_GM431946152.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/roblox-hack-script-pack_GM431946152.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/roblox-account-hack-script_GM431946152.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/roblox-lumber-tycoon-2-hacks_GM431946152.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/coin-master-free-spins-ios-2021_GM406889139.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/free-roblox-card-code-generator-2021_GM431946152.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/can-i-get-minecraft-windows-10-for-free_GM479516143.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/free-robux-sites-2021_GM431946152.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/free-robux-website_GM431946152.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/how-to-get-free-robux-instantly_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002dad.bin
bf4c9d2cf8a08797e5bf97b6180a892ad41b2c577a92d1b9b9d0bd05f84197f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DAD 22656 bytes
font_01_sfnt_off0000608d.bin
dcf6ca2d1a5186a8a9acd1ff0ce862b71408489350d05afe9bc604474ab31cd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x608D 18824 bytes

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