Malicious PDF — malware analysis report

Static analysis result for SHA-256 5411d88a34b492cb…

MALICIOUS

PDF

79.1 KB Created: 2021-04-15 02:31:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d556363b1f1791b9503312641e584874 SHA-1: 7ea3d8955cab6c8c53961d1bf88df7d410b085a2 SHA-256: 5411d88a34b492cb5f2e192656604f253322c3fdec96bc975e84c0fa6eebad60
214 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one critical heuristic identifying it as a malicious redirector. The primary malicious URL, https://dafemum.ru/strik?utm_term=how+to+use+a+presto+16+quart+pressure+canner, is likely used to funnel victims to phishing or malware sites. Another heuristic indicates a PDF link farm, suggesting a broader campaign to distribute malicious content. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence score strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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.
  • 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://dafemum.ru/strik?utm_term=how+to+use+a+presto+16+quart+pressure+canner In PDF document text
    • http://sazinoz.mypressonline.com/55348234861.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408879/normal_5ff01a97621d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453344/normal_6049b0a612e00.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489977/normal_5ff30a87eecd9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464083/normal_5fe41947a3cbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420610/normal_601f1cf0da481.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/xoferuzu/bspp_thread_chart.pdfIn PDF document text
    • http://denonewozififuz.rf.gd/circular_dependency_detected_on_resource_azure_template.pdfIn PDF document text
    • https://0eb00d84-361a-45dc-b346-1af5c8eb785c.filesusr.com/ugd/d79848_de65724e22bd448d9535506dfad4c230.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/begijufadi/information_technology_due_diligence_report_sample.pdfIn PDF document text
    • http://xajumin.epizy.com/82338489818.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/how_to_soft_reset_s9.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/23183964383.pdfIn PDF document text
    • http://rupesujutiwu.myartsonline.com/chemical_reaction_symbol_latex.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/ielts_writing_test_blank_answer_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/lecture_notes_on_digital_logic_design.pdfIn PDF document text
    • https://76c9fb28-c10e-4950-85be-37de24a2ede8.filesusr.com/ugd/fa32a6_aae1e4b5da6641ca954fbb496d368fa6.pdf?index=trueIn PDF document text
    • http://ziwemasux.myartsonline.com/twilight_movie_download_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/vavivivizodibawawexa.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/vaduleninolumop.pdfIn PDF document text
    • https://0f285ee0-1b14-49a2-8a3e-060a2db94812.filesusr.com/ugd/4bf67f_9ec361fe1c694a2b9d0e3ed3ac2e98d8.pdf?index=trueIn PDF document text
    • http://viwefar.rf.gd/37366662070.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/have_got_questions_worksheet.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_off0000f6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A2 5280 bytes
SHA-256: 3992e3e5c29f948714d2ccfcca5f0b52a79598c45897cd4367bb3aa17e221443
font_01_sfnt_off000108bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BF 11252 bytes
SHA-256: 213beb1074fda6c44d4553c3d37c81737f14254b31440996c6bdbc1dcfbbe6af

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