Malicious PDF — malware analysis report

Static analysis result for SHA-256 a742893a5a48738a…

MALICIOUS

PDF

72.9 KB Created: 2021-01-28 00:45:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 005c8eb684265cbd32f6a27107f099d4 SHA-1: d3a51c0bc9eaa3c237b63540514d54351df5e084 SHA-256: a742893a5a48738acc5e766f3c741edd71ed06303911717157afc5a094c3ab0d
126 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm on disposable hosting, with a high ML score and ClamAV detection as a phishing trojan. The embedded URL and document body suggest a lure for a 'Land rover repair manual free download'. Although no scripts were directly extracted, the PDF structure and external links point towards a phishing or malware distribution attempt.

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
  • 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://seumenha.ru/123?utm_term=land+rover+repair+manual+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404308/normal_5fea436b96607.pdfIn PDF document text
    • http://jakor.pro/92528779114f9vy3.pdfIn PDF document text
    • http://amsidisi.xyz/o_lobo_da_estepe_downloadb4z5a.pdfIn PDF document text
    • http://felidefewipikig.22web.org/16466859544.pdfIn PDF document text
    • http://zelafagilu.iblogger.org/cartina_stradale_basilicata.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lenixad.epizy.com/couch_to_5k_free_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/united_states_flag_color_sheet.pdfIn PDF document text
    • http://soburuwukipo.epizy.com/axl_full_movie_free_480p.pdfIn PDF document text
    • http://kiroxivox.epizy.com/acute_abdomen_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/business_expenses_spreadsheet_excel.pdfIn PDF document text
    • http://zoxuwabemowel.epizy.com/bizarasoxozufewazave.pdfIn PDF document text
    • http://mugudupo.epizy.com/academic_vocabulary_worksheets.pdfIn PDF document text
    • http://dogirajuwuxo.epizy.com/digestive_system_worksheets_for_grade_4.pdfIn PDF document text
    • http://bakenexiradofo.epizy.com/ableton_sampler_free.pdfIn PDF document text
    • http://liboditi.rf.gd/answer_key_of_apprenons_le_francais_3.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/94755793542.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_off0000df51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF51 5100 bytes
SHA-256: b13487264a8e245ebe5b672a035dc71f8f52a4b975481ff1dd4592d342fbe569
font_01_sfnt_off0000f0b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B5 11052 bytes
SHA-256: dc227cf79643f8a19ce5ac5f7b4c6818625c43a82f1aa769bb97a72e66fcb7c2

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