Malicious PDF — malware analysis report

Static analysis result for SHA-256 edac58f034420d07…

MALICIOUS

PDF

81.9 KB Created: 2021-05-17 15:12:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a882b5f07e037b478d7ceff53b8a41be SHA-1: 55aefaf3e465a865ed42bd7057bf50b5b28aae09 SHA-256: edac58f034420d074f88eef08b964f95d4e3f1e50bdcd96acd309a41370111e9
126 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The primary malicious URL identified is https://pelibifir.ru/strik, which is likely used to deliver a secondary payload or redirect to a phishing page. The document body, though heavily obfuscated, appears to contain a lure related to child panic attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/strik?utm_term=how+to+deal+with+child+panic+attacks PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427274/normal_60417fa7ed8dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452588/normal_5ff4f2cd1f00e.pdfIn PDF document text
    • http://linodogeb.scienceontheweb.net/blest_be_the_tie_that_binds_sheet_music.pdfIn PDF document text
    • http://jujovobima.getenjoyment.net/national_mall_parking_map.pdfIn PDF document text
    • http://wafixevewitope.mypressonline.com/59177646591.pdfIn PDF document text
    • http://igclienteam.com/piriformis_stretches_for_sciaticagibus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504870/normal_605901e525021.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416143/normal_5fe786b75ffa9.pdfIn PDF document text
    • http://kigurumi.org/80143174132hf17p.pdfIn PDF document text
    • http://zivemigidefis.mypressonline.com/9778552996.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416150/normal_5fd12aa021ea9.pdfIn PDF document text
    • http://jupifidupepir.getenjoyment.net/vofimoponigozos.pdfIn PDF document text
    • http://the-english-temple.com/what_is_the_relationship_between_curriculum_and_assessment9t4g4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wejajesenopezoj.onlinewebshop.net/ruwoviroxuridolilum.pdfIn PDF document text
    • http://wemaxoseni.myartsonline.com/figekinefogigewoneva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b9d4c05-2c81-45b0-92c6-e62c4cd97ef1/marketing_plan_sample_for_construction_company.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a08c817d-8b19-4260-8a66-a0271d1e101d/what_to_eat_when_running_a_half_marathon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/463f932a-34a7-4d83-b796-ddaa3103d284/97739094721.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/423d98c4-b0c9-455b-81b1-36d0e9158ad7/kitchenaid_gas_stove_customer_service.pdfIn PDF document text
    • http://rivenoke.onlinewebshop.net/do_vitamix_blades_need_to_be_replaced.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca0c23b3-f675-41e8-915d-2a344a6f73e8/rapirexatuvisakom.pdfIn PDF document text
    • http://rodisasedozax.myartsonline.com/tetafom.pdfIn PDF document text
    • http://taguloxutenafol.myartsonline.com/how_much_should_a_screenwriter_get_paid.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BE 4968 bytes
SHA-256: 187b92e98e4a0694435c39f0919d3acb7c4c0248ef99423e5c8a0ee2d313765b
font_01_sfnt_off000106a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A6 10476 bytes
SHA-256: c46588877c8ac78c264748f76ec552c5c76f56aa670f4d65cba51328a3def40f
font_02_sfnt_off00012a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A53 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333