Malicious PDF — malware analysis report

Static analysis result for SHA-256 70215b4a6df8297c…

MALICIOUS

PDF

76.5 KB Created: 2021-03-23 00:13:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9bfa137ec05a68935f16798c10098122 SHA-1: 88508fa5e4bc333c3421049c919b5b450aecc995 SHA-256: 70215b4a6df8297c2694bff8f1e8c5c16034734e9cd0718b259d03682a8ea39a
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure to a malicious website, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/award?keyword=grammar+exercises+for+middle+school+pdf PDF link annotation
    • https://vojizozovogimum.weebly.com/uploads/1/3/0/7/130740342/9720c02d65e4.pdfIn PDF document text
    • http://sitizinudex.getenjoyment.net/amadou_hampate_ba.pdfIn PDF document text
    • https://jadusulad.weebly.com/uploads/1/3/4/7/134764450/1438029.pdfIn PDF document text
    • http://fkpravo.ru/how_to_pay_attention_in_class_with_adhdclji4.pdfIn PDF document text
    • https://kilewesiviteki.weebly.com/uploads/1/3/1/1/131163613/2010635.pdfIn PDF document text
    • https://lezanixopedem.weebly.com/uploads/1/3/4/8/134886347/2862884.pdfIn PDF document text
    • http://bizegusesugusus.iblogger.org/basic_order_of_operations_worksheets.pdfIn PDF document text
    • http://kavakedego.scienceontheweb.net/the_best_of_me_dawson.pdfIn PDF document text
    • http://feelslike35.com/66747337454o47wf.pdfIn PDF document text
    • http://verifiedbadge-lnstagram.com/71849680101uxggs.pdfIn PDF document text
    • http://maduzisuzavi.22web.org/lindamood_bell_seeing_stars_word_list.pdfIn PDF document text
    • https://xonedapu.weebly.com/uploads/1/3/4/6/134654428/wiwizejisele.pdfIn PDF document text
    • http://wopuxefisov.iblogger.org/whatsapp_call_not_answered_blocked.pdfIn PDF document text
    • http://siondez.ru/727984911703qpa8.pdfIn PDF document text
    • http://maska-respirator.shop/termination_letter_format_for_absconding_employeecsoz4.pdfIn PDF document text
    • http://prosale.company/nowozakekefezapomidetnc2bf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fajegexowesidet.rf.gd/genetic_basis_of_inheritance_mcq_with_answer.pdfIn PDF document text
    • http://pexaniruvuwuwe.rf.gd/central_committee_for_deepening_overall_reform.pdfIn PDF document text
    • http://jakiwor.rf.gd/58768402749.pdfIn PDF document text
    • http://padijajuvon.rf.gd/ledavis.pdfIn PDF document text
    • http://rulamiji.onlinewebshop.net/ramen_cookbook_barnes_and_noble.pdfIn PDF document text
    • http://nifojasavolu.rf.gd/barron_s_sat_chemistry_13th_edition.pdfIn PDF document text
    • http://tizepadeda.rf.gd/jikinenuliniwesepuwopaxe.pdfIn PDF document text
    • http://vekejuf.atwebpages.com/mezarevetizuvikogixil.pdfIn PDF document text
    • http://lavewas.epizy.com/25148035963.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_off0000eda9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA9 5492 bytes
SHA-256: 9bc4e0f5ef57ac0358de09ec6b7cc6ca01f9196cc320e8bf03345a75218be7bd
font_01_sfnt_off00010033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10033 10540 bytes
SHA-256: 6e92a3b2882ff5025fd3d6053f390a2df10399cdf0ce93b5499d678428dc9f6b

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