Malicious PDF — malware analysis report

Static analysis result for SHA-256 d92bb6d07228c60e…

MALICIOUS

PDF

85.6 KB Created: 2021-08-10 13:18:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2b57f73190e8630a3b7c996608a25989 SHA-1: fdb1ef48c0272dd3b043c6b2fbadef9b85d70817 SHA-256: d92bb6d07228c60e26baba20d5712467006380d29b51e0750e46a7db0e3f6fe1
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm. The embedded URLs are likely intended to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f37261aa85---wukevuzowemap.pdf In PDF document text
    • http://anandtouristcorporation.com/uploads/zivamagokojotuda.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/gm9mj7b0ap9e1akui4fhavr2q2/karetasog.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/9df27c4919a53c837dd067a2bdc52fda/peteti.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/bikoxawitevafoxexaxitizu.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///51648611521.pdfIn PDF document text
    • https://flyingfish-stay.com/userfiles/file/85928611299.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/4lpoc5d1e9k40bl6nsefci23k0/78094055985.pdfIn PDF document text
    • http://kunjipsc.com/uploads/files/85085419058.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/9006bff3fd74086505352944ed296bfe/64884480172.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/dmgmofgd1t7bipbu5gcv67qqg5/24342092444.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/wutiras.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/6f92f97d0b2e81072c31cd2d6325a259/todilagesuz.pdfIn PDF document text
    • https://grandhotelbulgaria.com/userfiles/file/17546057348.pdfIn PDF document text
    • https://energiadirect.pl/application/resources/ckfinder/userfiles/files/50258916456.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/bf58e1c35884bd04fe4b7d3b8b9d5c7c/4151450703.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/11916356792.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e89041618cf---kobasezibuwifaxogizago.pdfIn PDF document text
    • https://duhocblueocean.vn/ckfinder/userfiles/files/97236793574.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/egdodc59q7hmm9rii7u5f9acq1/64240707987.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/fejufanobiges.pdfIn PDF document text
    • https://zenmobile.in/jaipriyart/uploads/files/petivetuwurivutixuxilotin.pdfIn PDF document text
    • http://coumert.com/images/file/zoreritonu.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079336da61b1---56050678875.pdfIn PDF document text
    • https://turismopontevedra.com/ckfinder/userfiles/files/duneraja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=que+paso+ayer+3+pelicula+completa+en+espa%C3%B1ol+latino+online+gratisPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE223 11368 bytes
SHA-256: 787ad40c080810f3e971e7a16e9018488669dc151d35880adab932ce6e2d42ea
font_01_sfnt_off0000fcd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E7 18904 bytes
SHA-256: 5858e53fe5e132061e72038ada7f2fdb3e7eba211b41a29ecf664e3a85bebc2e

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