Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf98dcdb1414c0f4…

MALICIOUS

PDF

68.7 KB Created: 2021-01-26 20:45:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 7fb93dd53b1370930306a8882667220e SHA-1: 8e9a2208988bb062acfb05f82e0a901f9fea17ff SHA-256: bf98dcdb1414c0f411a0595d7990ed6545e8e13d345680d80fdaefeddb473107
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=northern+european+plain+coordinates In PDF document text
    • http://javebamugizal.66ghz.com/41422184724.pdfIn PDF document text
    • https://fuvetozexogix.weebly.com/uploads/1/3/0/8/130874326/1d96040.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409421/normal_5febe9b26c48e.pdfIn PDF document text
    • http://baxosemot.iblogger.org/madura_raja_imdb_collection_report.pdfIn PDF document text
    • http://gajozemexip.22web.org/vozuzik.pdfIn PDF document text
    • https://rigugoxa.weebly.com/uploads/1/3/0/7/130776225/vaxegugugezujosi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380700/normal_5fcff067d045c.pdfIn PDF document text
    • https://warevinigipa.weebly.com/uploads/1/3/4/8/134898994/7517872.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vakisetituli.rf.gd/37656875323.pdfIn PDF document text
    • http://jokiperone.epizy.com/bukurafizu.pdfIn PDF document text
    • http://fomobiwudaz.rf.gd/speculation_tax_bc_online_form.pdfIn PDF document text
    • http://gazisemodab.epizy.com/brolly_sheets_nz_stockists.pdfIn PDF document text
    • http://kikevanalujik.rf.gd/2675917599.pdfIn PDF document text
    • http://jelenexej.rf.gd/28166236969.pdfIn PDF document text
    • http://wamodaf.epizy.com/hydraulic_accumulator_applications.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_off0000cf88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF88 5132 bytes
SHA-256: 15b1f3e37cb1e731c5fc2bac476b81fcc2bdb372eacfafe76d9c1d3280df40ac
font_01_sfnt_off0000e0f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F3 11152 bytes
SHA-256: dc2f314fc9d0c177fd6e159a1fd549bd13d00ea80db833acc189e6d02ae68bec