Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce5641eaecc8441b…

MALICIOUS

PDF

90.1 KB Created: 2021-09-04 15:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1d95b43a00503d70ed88dadf2e96f165 SHA-1: 451f0e08dd179d30e863fa58f235ee91b22d23e9 SHA-256: ce5641eaecc8441b9e3e75fc95baccd6deb54e66d058118bfeb452be4f0897f3
124 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs, many pointing to potentially compromised WordPress sites. The ClamAV heuristic identifies it as a 'Pdf.Phishing.Trojan', indicating a malicious intent to lure users to malicious content. The structure suggests it's designed to evade direct analysis by presenting a large number of links on disposable or compromised hosting.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4066

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://sanipacific.com/attachment/file/wofaxalenasiketavatijip.pdf In PDF document text
    • http://bastola.org/userfiles/file/43998935033.pdfIn PDF document text
    • http://bjjiffy.com/upload/63858452932.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/64052732862.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/litinasokuwuvuxevewogaf.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/mn35ojgcagbhrmelm7u74l4384/pudisox.pdfIn PDF document text
    • http://nhatnguyen.vn/media/ftp/file/direvipaxuxinefememurerob.pdfIn PDF document text
    • http://sungsam.net/userData/board/file/zenavubumasoge.pdfIn PDF document text
    • http://synowka.pl/galeria/file/48493079285.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/b6857b71cc660bc452efac2575ea23c3/23496671440.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/83880271652.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1947568f2---xokosubirimuwoganuzig.pdfIn PDF document text
    • http://hookmyweddingup.net/clients/73542/File/44017870600.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2ed583184---malanesasopinawutigipeli.pdfIn PDF document text
    • http://nguyenthaotech.com/upload/files/xawikixer.pdfIn PDF document text
    • http://dvarenda.ru/upload/file/44569900298.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/c6410a9643f3759abf68083651da2c33/vavadevavijoguma.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/c2tmcttdlhiqmc9jvbt62emagr/26669827300.pdfIn PDF document text
    • http://seja.lv/assets/ckfinder/core/connector/php/uploads/files/lazawesexobumaruv.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7cdd45d88---zesoviradubijataxef.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160dc69ecdead1---32981390490.pdfIn PDF document text
    • https://pasarant0g3l-turbo-h1t.com/contents//files/rabewatud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=catur+asrama+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000115cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DDD 18696 bytes
SHA-256: 3938d01cb484dc9d232cd2cc70cb87204081d3903c522aa8e3cf35b0e3dfed18

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