Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b6be92d33ce76f…

MALICIOUS

PDF

78.3 KB Created: 2021-02-22 22:52:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 8c3b2dcfe5ab39110ad1759df228f3b6 SHA-1: f7199c5010cb26c24d3e81bd370dd5c4464cd008 SHA-256: 72b6be92d33ce76f31f289aa6c71e4b6259e3c934e0bf63e305fe71d8e71dc97
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wb?keyword=fios%20quantum%20gateway%20router%20alternative In PDF document text
    • https://xevoniwibefi.weebly.com/uploads/1/3/5/9/135984774/70f08432ef48a72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408865/normal_5ffd252260aa1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456685/normal_600917cfc858a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473622/normal_60047af7eee89.pdfIn PDF document text
    • https://bewimesev.weebly.com/uploads/1/3/4/7/134753962/nolijabibugoz.pdfIn PDF document text
    • http://medyayazilimtr.com/jofafaxojitudegigowa7faye.pdfIn PDF document text
    • http://about-central.com/tikefinofixaniferemomcb9g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446260/normal_601879dbb1fd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448535/normal_60244eefa13db.pdfIn PDF document text
    • http://topstop.site/cloud_printable_templatexymos.pdfIn PDF document text
    • https://livakazogoje.weebly.com/uploads/1/3/4/6/134622539/pevujubejoruzezo.pdfIn PDF document text
    • http://studytogether.fun/mugen_zoom_stagesn4mq1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/aceableagent_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/australian_tv_guide_queensland.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/7_articles_of_the_constitution.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/lomupoteviduradilegi.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/31016275353.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/86216860845.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_off0000f6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B1 5340 bytes
SHA-256: 68e8c79a5e6821f3fa2afee5c360dde8975deb33115bb057b074c30652afc834
font_01_sfnt_off000108df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108DF 10308 bytes
SHA-256: cf52ed920d9404cbdd313e4380cde0639803102974db2ccc5564fab9c2418c6f

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