Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb05e3cd74c6ce54…

MALICIOUS

PDF

86.9 KB Created: 2021-06-09 08:18:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c1bd4bfcea8e12812fca769ff227849b SHA-1: a9aac3b62edc7668f1e88418e52acde53261f492 SHA-256: fb05e3cd74c6ce5458833afcf742ab748e5c14cc3d98f41abecca965e8da5324
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF contains a link farm with numerous external URLs, suggesting an attempt to direct users to potentially harmful content or phishing sites. The presence of a link to 'xezojetit.ru' is particularly suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xezojetit.ru/123?utm_term=hatsun+curd+ad+music+free PDF link annotation
    • https://fadinozejekoxoj.weebly.com/uploads/1/3/4/6/134659303/tobosi.pdfIn PDF document text
    • https://bapoxipen.weebly.com/uploads/1/3/4/6/134684349/zilenazaselege_gorewiwususa_jogajamenupono_gezajetasovife.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488560/normal_605546115e511.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448976/normal_5fe2b69727b7d.pdfIn PDF document text
    • https://paseselok.weebly.com/uploads/1/3/1/8/131858791/vexonovud-bapufomizezet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425211/normal_605186937b708.pdfIn PDF document text
    • https://mowavowami.weebly.com/uploads/1/3/4/5/134591552/fc7b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371005/normal_605cb298b58dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370092/normal_5fd1e232ced03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386361/normal_60535d8c63484.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426828/normal_5fd820e269150.pdfIn PDF document text
    • https://galebekamabe.weebly.com/uploads/1/3/4/3/134305591/zenilor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443608/normal_600e13e151d2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445754/normal_605eeffd2e495.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gibuwodebu.pbworks.com/w/file/fetch/144514776/what_is_the_working_principle_of_hydraulic_pump.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f01a271-4091-4c86-aa1f-03d599007e35/gatiboxubemipimuxofejin.pdfIn PDF document text
    • http://tevimunon.pbworks.com/w/file/fetch/144796569/limikanenelokutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6698925-c1ed-41a7-8099-70e4ee5ed3bb/verizon_ellipsis_hotspot_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ee985f9-4bd9-4da8-bcd1-5009a3c6a0e6/how_do_i_find_out_my_childs_lexile_level.pdfIn PDF document text
    • http://xegosigex.pbworks.com/w/file/fetch/144753678/nomenclature_of_organic_compounds_practice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed95e797-8341-4b12-ae0d-14596d5214a5/john_deere_175_hydro_parts_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c528a03e-328a-4d75-baa1-cfff2d6895f1/what_is_convolution_theorem_in_signals_and_systems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea525e3a-8364-44a6-99aa-f1a5f7358998/how_much_does_a_restaurant_consultant_make.pdfIn PDF document text
    • http://kimiwodevus.pbworks.com/f/rijizafobilewezad.pdfIn PDF document text
    • http://lipovosufuk.pbworks.com/w/file/fetch/144789654/7544674760.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF24 5096 bytes
SHA-256: a2a55939a655441c71df2efb4f8c17256c38bba7190c11b3024875d7decb033e
font_01_sfnt_off00011062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11062 11880 bytes
SHA-256: c698c237b98f255fac3040c021f1ba91177d17e5bb44f3508418c21b90519743
font_02_sfnt_off00013922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13922 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67