Malicious PDF — malware analysis report

Static analysis result for SHA-256 f433e99af4de5e8d…

MALICIOUS

PDF

99.1 KB Created: 2021-03-29 07:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c14841e9a86ce277b5db1575cdba9e5b SHA-1: 749d74c09cc39e814d8f386c50fe264992632766 SHA-256: f433e99af4de5e8d3a39b466f4cb2f3f1c4fb06ae7cab02bade66c06ce1dd5c0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://mezovuduw.ru/aws?utm_term=fisher+%2526+paykel+dishwasher+manual PDF link annotation
    • http://xejevojesinil.22web.org/spanish_1_midterm_exam_answers_edgenuity.pdfIn PDF document text
    • http://rutametigaw.22web.org/3117700665.pdfIn PDF document text
    • https://muwunijika.weebly.com/uploads/1/3/1/3/131398004/4438612.pdfIn PDF document text
    • https://pekatube.weebly.com/uploads/1/3/5/3/135393066/meluvula-ralaxeguvaduser-zebofikomijuxi.pdfIn PDF document text
    • http://finovadi.iblogger.org/source_sans_pro_ttf_font.pdfIn PDF document text
    • https://getifejijepe.weebly.com/uploads/1/3/0/7/130739552/7078853.pdfIn PDF document text
    • http://velixone.66ghz.com/20687942167.pdfIn PDF document text
    • http://loletopuwiv.iblogger.org/crossword_jam_answers_level_17.pdfIn PDF document text
    • https://degusatujetuz.weebly.com/uploads/1/3/0/8/130813325/3233222.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jimijafo.epizy.com/dokomosenopajibifajaw.pdfIn PDF document text
    • http://kurorasi.rf.gd/lutolefubugidajoxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fb552e6-cfb3-4001-a2ed-b3a9fe3718e8/maze_runner_3_synopsis_movie.pdfIn PDF document text
    • http://gepaxeli.rf.gd/solving_absolute_value_equations_with_variables_on_both_sides.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/jarijevodizafobigugogiz.pdfIn PDF document text
    • http://xonelamurojili.rf.gd/gobet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/215ea333-d0af-40ae-90c0-ed156c261fd1/josekelopunimixepi.pdfIn PDF document text
    • http://firasakujataj.epizy.com/mogexi.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/how_to_start_woodworking_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e01ab1c7-e4e0-4ef7-8ffc-4969b50f4757/30760752126.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/first_grade_math_sheet_printable.pdfIn PDF document text
    • http://juvofirodeburu.epizy.com/database_management_services_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/kotidox/chronically_ill_form.pdfIn PDF document text
    • http://fusikisedote.epizy.com/taruxasatidoxiruvapuzavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/667f78a8-a308-4486-9907-e4891778242e/line_6_spider_iv_15_jazz_settings.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_off0001496a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1496A 4480 bytes
SHA-256: 8cb45facd36c061a0d69f2832c163684b131a5d4abd2729493abd812a35e4cc9
font_01_sfnt_off00015894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15894 11296 bytes
SHA-256: 1090d3fbbd5fc6611ec37fe1c88d86aaa72042a3522b03c3e09b605ef8e0c7be

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