Malicious PDF — malware analysis report

Static analysis result for SHA-256 de05c859e231ba4c…

MALICIOUS

PDF

77.0 KB Created: 2021-04-03 11:09:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1be566d6055cdb8e6d79f9762e68dbeb SHA-1: e06d5a82e298832ef87adf975475bbd9e0d71265 SHA-256: de05c859e231ba4ccc4a954365fed5579e0857b1afa4dd7c9cb4d02bfac4968c
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'lozipotod.ru' and a query parameter suggesting a lure related to 'weed eater push mower parts'. The PDF structure and the presence of many links on disposable hosting indicate a link farm designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://lozipotod.ru/strik?utm_term=weed+eater+push+mower+parts PDF link annotation
    • http://fusagawi.iblogger.org/45969329728.pdfIn PDF document text
    • http://reestr.site/pamarirj2uu.pdfIn PDF document text
    • http://bcpzonasegur4viabcp.com/boating_test_study_guide05jo2.pdfIn PDF document text
    • http://pawezujexas.mywebcommunity.org/mubivezikudoru.pdfIn PDF document text
    • http://businesshelpservice.com/heart_of_darkness_quotes_with_page_numbersrdrvj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kapekoguxepo.rf.gd/finding_decimals_on_a_number_line_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/542088b4-7ac3-4cad-bdac-b4f2f0a3c3ea/93941319920.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bfe91e5-c071-4934-9e2e-2c02b2b9417f/cual_es_la_ley_moral_en_la_biblia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5580b5e8-dccb-4485-b910-26e0990e661d/how_to_install_alarm_siren.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f7e6866-db95-4814-9716-30eeab507673/nc_road_signs_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a4e5ec0-d060-443b-abdd-8f6753821b6b/old_greek_god_movies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddf36183-2ea5-453e-b89c-88485338118e/7105651241.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/95792433519.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/bob_books_set_4_reading_level.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/negative_binomial_distribution_problems_and_solutions.pdfIn PDF document text
    • http://tovetetuw.rf.gd/business_model_canvas_deutsch_vorlage.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/98141331719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf71d5ae-4d74-4f0e-9926-c99539c9a1fc/90742434574.pdfIn PDF document text
    • http://ranitirunom.myartsonline.com/que_se_requiere_para_un_credito_hipotecario.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5509c684-bcfe-429f-99ce-fc73b14f734e/14023778368.pdfIn PDF document text
    • http://mevabifutaxepag.epizy.com/craftsman_yt_3000_review.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/nogip.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_off0000f0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BF 5272 bytes
SHA-256: fcd3d113fe029ebdf326f5cbaba774363e242fa890193c2bedab1360701634ee
font_01_sfnt_off00010295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10295 10572 bytes
SHA-256: ef06f731b3d5f4f4994e0d98b73322d31c4511ea07c846d4411ab069035afd08

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