Malicious PDF — malware analysis report

Static analysis result for SHA-256 543b5848c3c46504…

MALICIOUS

PDF

77.8 KB Created: 2021-03-05 09:41:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 4f1717079a6d9bf86caceeb7be6db801 SHA-1: 44d656892f22e34a8ee6c1c5b952de8e7d6d3e2f SHA-256: 543b5848c3c46504ec85db1404aee03b84b5712f02257aeaa00e3bc482cd348a
126 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
  • 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://leonvi.ru/wb?keyword=is%20sarah%20plain%20and%20tall%20based%20on%20a%20true%20story PDF link annotation
    • http://tihefers.online/menefuruwesexepsg5e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486984/normal_6019a2f179cc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475588/normal_60172128e9ff5.pdfIn PDF document text
    • http://899themes-demo.ru/jijasopedokimewq9q3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414486/normal_602e0820490be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469365/normal_5fe1f7ffda9b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392659/normal_60124fa067f11.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/cloud_9_vape_raleigh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zepibugab.rf.gd/offline_avast_antivirus_free_2018.pdfIn PDF document text
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_29bdd801b6ce4cabb09a90072e07d306.pdf?index=trueIn PDF document text
    • http://kenakazukigixow.rf.gd/free_css_footer_templates.pdfIn PDF document text
    • http://bavipilebevim.epizy.com/video_format_converter_online_to_mp4.pdfIn PDF document text
    • http://kepawomokatuke.myartsonline.com/reddy_heater_30000_btu_parts.pdfIn PDF document text
    • http://nirufexu.rf.gd/96196598700.pdfIn PDF document text
    • http://mepigaruvuj.rf.gd/gewusid.pdfIn PDF document text
    • http://sinumulebojufa.epizy.com/jabemiwixutuwezikam.pdfIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_ae9f9d6f535c493899c98b0102b55dee.pdf?index=trueIn PDF document text
    • http://dixasimoxipux.rf.gd/bazaviti.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_off0000f247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF247 5224 bytes
SHA-256: 10f2c446add243a70d07288a3cd8e2d3fac4618ff0e5fb3ceb24e421debdd7df
font_01_sfnt_off00010401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10401 11224 bytes
SHA-256: 1917cd40b709ec9ed3fb8a5d916f04a4feb487ffeabb65e77a390e0f3116956f