Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ebd96be6c562d71…

MALICIOUS

PDF

71.8 KB Created: 2021-06-11 06:56:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0da858563833c2c943cb59937268237a SHA-1: c3c2381bcc9fad622bcd3fe5cbe7c269ffde6e49 SHA-256: 1ebd96be6c562d71e7564b124d24a9e9069193fe75f72d1ff26e758f141e154d
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://crysiq.ru/pbw?utm_term=best+free+to+play+battle+royale+games PDF link annotation
    • https://makezuxakoje.weebly.com/uploads/1/3/0/7/130739015/butisumekiza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471971/normal_6068412305d21.pdfIn PDF document text
    • https://finibolamojirum.weebly.com/uploads/1/3/5/3/135341575/7723362.pdfIn PDF document text
    • https://vokijovagugudis.weebly.com/uploads/1/3/0/7/130776016/samuxakebo_lemot_xifuvidiguxavez_tugilafezatano.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456996/normal_605509e802bdc.pdfIn PDF document text
    • https://xalebune.weebly.com/uploads/1/3/4/8/134889571/36aa28afb4e.pdfIn PDF document text
    • https://nufodovepitad.weebly.com/uploads/1/3/4/7/134718778/2548849.pdfIn PDF document text
    • https://fisofomopix.weebly.com/uploads/1/3/4/6/134603918/5293643.pdfIn PDF document text
    • https://gatevipamor.weebly.com/uploads/1/3/4/8/134878843/10664.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466679/normal_6003242611aa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504568/normal_6062e1c692b85.pdfIn PDF document text
    • https://vetexugosopaviz.weebly.com/uploads/1/3/0/7/130738505/ziwibuto.pdfIn PDF document text
    • https://metolokinazez.weebly.com/uploads/1/3/1/4/131452743/70a58da1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424666/normal_6003e568f0e06.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://favixose.pbworks.com/f/wawogurasifitimabizu.pdfIn PDF document text
    • http://murusefikuk.pbworks.com/w/file/fetch/145069578/star_delta_control_wiring.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65795502-9ea4-4e90-9d02-44694800b680/26955532651.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dded466-520b-463c-a57c-f3eb192b6c99/mevesomovogofixifedator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40658ed3-cc10-40db-b46b-ae335680394c/32061785053.pdfIn PDF document text
    • http://lekipirunezi.pbworks.com/f/newulivuridutinobijepiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8396db4f-5a70-4a9f-9e47-32382d0c924e/35330685882.pdfIn PDF document text
    • http://kepojijudiva.pbworks.com/f/it_security_incident_report_template_word.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC23 5512 bytes
SHA-256: 0f2ed045d8946fa03a73c387dbfe8102cded21e2cd38020fa0d425b0e45e158f
font_01_sfnt_off0000eedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDD 10172 bytes
SHA-256: 4c8de441f797e3867c4cfb03f4330539da19b5f1d84c07ffddb54caa1120fd21