Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc84b35a1b757025…

MALICIOUS

PDF

47.5 KB Created: 2021-06-03 14:56:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9f595e06c36f9f0c34515cc9159e725f SHA-1: 1103743c6669cd7516843e4cf8d7367f9e814eb4 SHA-256: cc84b35a1b757025f992c1dcf792550910cc88fa5034a68d3b41369521ea2cef
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links to external websites, many of which are SEO-optimized and point to pages offering game hacks, free Robux, or Coin Master spins. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests a coordinated effort to direct users to potentially unwanted or malicious content. No scripts were extracted, but the document's structure and embedded URLs indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/479516143/minecraft-windows-10-hacks-game-hack PDF link annotation
    • https://www.jcn.co.uk/uploads/files/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/pokemon-go-kanto-tour-free-version_GM1094591345.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/get-verified-tiktok-free_GM835599320.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/como-hackear-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/javascript-free-robux_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-tiktok-followers-no-downloads_GM835599320.pdfIn PDF document text
    • https://sigmaclient.info#2In PDF document text
    • https://flux.today#3In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005649.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5649 31512 bytes
SHA-256: 5e80a3a326b28ed2dc1cd08f06a5cf58bc6e04fbbee2943d393b03d554cfdd23
font_01_sfnt_off000095d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95D8 18696 bytes
SHA-256: 14f86b407040f424958936cb2b2b49b26067a8980bd50a77917f0563cc1bff87