Malicious PDF — malware analysis report

Static analysis result for SHA-256 817d2531ce38cb9b…

MALICIOUS

PDF

35.1 KB Created: 2021-07-01 17:57:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 41b6d36896e6ae7c17e4ddf9481f6d16 SHA-1: 2dd56136f7fc707b8200745f74b8d9e3427c3a99 SHA-256: 817d2531ce38cb9b1dcc137db1450e819d0cec0ec629f5ef60545bbb8460f709
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a link farm, all pointing to sites offering game hacks and cheats. The ML classifier strongly indicates maliciousness, and the presence of external URIs suggests the document is designed to redirect users to potentially malicious download sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

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/hack-roblox-vermillion-game-hack PDF link annotation
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/is-roblox-free-to-download-on-computer_GM431946152.pdfIn PDF document text
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/robux-generator-robux-cheat-roblox-hack_GM431946152.pdfIn PDF document text
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdfIn PDF document text
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-dot-xyz_GM406889139.pdfIn PDF document text
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/hacker-destroza-la-ciudad-roblox-pokemon-gomiannn_GM431946152.pdfIn PDF document text
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/blonde-hair-roblox-free_GM431946152.pdfIn PDF document text
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/red-boy-hack-roblox-descargar_GM431946152.pdfIn PDF document text
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/gaming-ultra-roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/roblox-people-girl_GM431946152.pdfIn PDF document text
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31E7 22452 bytes
SHA-256: ad94e48bd5f36ec526bcd5eb973272cc116180ee681e204281b403a0a3c55217
font_01_sfnt_off000063f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F9 19168 bytes
SHA-256: 60f2bcab195ec4e7d53e3ce7b949e0df3b27c9581ba338b1d5b466211e163a59

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