Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fc6a2525b5d9745…

MALICIOUS

PDF

78.6 KB Created: 2021-03-19 16:01:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: d3c48f205f7d94f35e510d8065f8e729 SHA-1: 871136bdb61b2dd2e1588d318cbaae9403ce9d7c SHA-256: 9fc6a2525b5d9745855fd94736cde0bde78fd530776e425ab066e28139d10258
126 Risk Score

Malware Insights

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

The PDF document is classified as malicious by ML and ClamAV, and exhibits characteristics of a link farm on disposable hosting. It contains numerous embedded URLs pointing to potentially malicious sites, disguised under a lure related to anxiety relief. The document body, though heavily obfuscated, suggests a deceptive intent to redirect users to external resources.

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://resalured.ru/strik?utm_term=which+mudra+is+best+for+anxiety PDF link annotation
    • http://dihtyar.online/flytende_fisk_knivteaoz.pdfIn PDF document text
    • http://secret-empire.ru/wurinoxtprre.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447912/normal_6049256a93eed.pdfIn PDF document text
    • http://foxiduwanati.mygamesonline.org/cbse_board_exam_time_table_2020_class_10_download.pdfIn PDF document text
    • http://tujubafi.getenjoyment.net/constructing_perpendicular_lines_worksheet.pdfIn PDF document text
    • http://rebelliona.online/small_engine_repair_classes_in_nj45wff.pdfIn PDF document text
    • http://lopabobogegise.iblogger.org/resume_atomistique_s1_smpc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379482/normal_5fe975cacc056.pdfIn PDF document text
    • http://wasegulom.mygamesonline.org/tugagekunitetivi.pdfIn PDF document text
    • http://vijexibat.mywebcommunity.org/44258924584.pdfIn PDF document text
    • http://copyrightshelpscenters.com/national_curriculum_standards_for_social_studies_bookmirk0.pdfIn PDF document text
    • http://najezeb.22web.org/48993645149.pdfIn PDF document text
    • http://healthytrands.com/93559612728q0vw5.pdfIn PDF document text
    • http://sparzha.club/what_kind_of_oil_filter_does_a_2009_toyota_corolla_take5ntq5.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/jarirotexab/why_does_my_subwoofer_stop_working.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/92509312607.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/brucellosis_test_record_form.pdfIn PDF document text
    • http://tolevekup.epizy.com/kovajumiroxarazevigota.pdfIn PDF document text
    • http://gozudil.onlinewebshop.net/articles_on_swot_analysis.pdfIn PDF document text
    • http://ramawotinejog.epizy.com/caymus_cabernet_2016_fact_sheet.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_off0000f587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF587 5552 bytes
SHA-256: 888c99baa3f3f50182574e7b4ed48ebac859c325fb012d049484da2ad0465077
font_01_sfnt_off00010852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10852 10892 bytes
SHA-256: e90ffd059c3515ce0b229829489775a68dceaf3abceab325e18153cc05abdd3c

Open this report in the interactive analyzer, or submit your own file for analysis.