Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2e9957653e29404…

MALICIOUS

PDF

77.1 KB Created: 2021-05-14 19:59:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: af43fbb1750ce14be247411d13e5d92d SHA-1: 9adeb704a5c67dad7abda6a6217d1daf6e7eee81 SHA-256: d2e9957653e29404663a7cf1520f2afbaccfc081867074f23f8b3e7c408252c9
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jottigo.ru/strik?utm_term=2018+lexus+rx+450h+f+sport+for+sale PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4492892/normal_6016a5155d35e.pdfIn PDF document text
    • http://naremegefo.iblogger.org/procurement_specialist_job_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390068/normal_5fd64e112ecc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501214/normal_601baceb48122.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501383/normal_5ff3b97213bee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453334/normal_6032a0fb5dc37.pdfIn PDF document text
    • http://fabikaj.iblogger.org/79244693152.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473902/normal_5fea3473aad4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369508/normal_601cb4c3d5a62.pdfIn PDF document text
    • http://fudutotiv.iblogger.org/queen_bohemian_rhapsody_tab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450635/normal_60445f06c2bbb.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/juvosi/ala_baburao_song_video.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/61479688986.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/how_to_assemble_a_total_gym.pdfIn PDF document text
    • http://bimimikojawador.rf.gd/43625402871.pdfIn PDF document text
    • http://fedatowuka.epizy.com/texas_autentico_2_workbook_answers.pdfIn PDF document text
    • http://zuzekawi.rf.gd/how_to_do_order_of_operations_math_problems.pdfIn PDF document text
    • http://napalujimawoz.rf.gd/logical_maths_questions_and_answers.pdfIn PDF document text
    • http://fikojadepo.rf.gd/41038511627.pdfIn PDF document text
    • http://tokewaperomuveb.epizy.com/mito_e_lenda_definio.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/rozuj.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/duvelolijulonorokivepewel.pdfIn PDF document text
    • http://nexofemexer.epizy.com/nccn_guidelines_for_patients_kidney_cancer.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_off0000ec1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1E 5692 bytes
SHA-256: c92589ba3f9ac3d0088c33f46d1c85102049a65ddbd460882cb5278eb48ae0a8
font_01_sfnt_off0000ff8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8D 11608 bytes
SHA-256: 956ffd095cfd7e101753dbda285b3250b5e4c66aabb6f11e242bc7cbd0e74b46

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