Malicious PDF — malware analysis report

Static analysis result for SHA-256 e45d2a398c590f81…

MALICIOUS

PDF

91.4 KB Created: 2021-03-23 22:49:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a4b69ae1fa476e7e1a0fc8a77d81e5e8 SHA-1: 75c8c7b608ca4d06d3fc235c159aa307244bb1b2 SHA-256: e45d2a398c590f81b71e5206615e34ecb49566b2dd037550678910b68341588f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/123?utm_term=informati+despre+castelul+peles+in+engleza PDF link annotation
    • http://revilokepudidu.mygamesonline.org/31900813883.pdfIn PDF document text
    • http://7lessons.website/cladogram_analysis_worksheet_answer_key380w5.pdfIn PDF document text
    • http://logmeinnow.xyz/9893180914vn7gh.pdfIn PDF document text
    • http://lusolakidareve.mywebcommunity.org/8436668135.pdfIn PDF document text
    • http://rapoxarawiwalo.sportsontheweb.net/acrobat_reader_to_converter_online.pdfIn PDF document text
    • https://waxevinibiwe.weebly.com/uploads/1/3/0/9/130969944/8328540.pdfIn PDF document text
    • https://menuwenuxunok.weebly.com/uploads/1/3/4/6/134682317/1572541.pdfIn PDF document text
    • http://jafinipu.scienceontheweb.net/sufikotekabuzexilega.pdfIn PDF document text
    • https://tuwopabawebude.weebly.com/uploads/1/3/1/3/131382790/wasasidivegam_lozufitojapa.pdfIn PDF document text
    • http://lipatajewaxo.22web.org/arb_compressor_install.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/sirimijonexenuzod.pdfIn PDF document text
    • https://luruxelu.weebly.com/uploads/1/3/2/6/132682974/20aff.pdfIn PDF document text
    • https://sowibize.weebly.com/uploads/1/3/5/3/135348762/1a3ab3d765763.pdfIn PDF document text
    • http://brettlockhart.com/703011577483ezbj.pdfIn PDF document text
    • http://shlifovka-pol.website/structural_audit_report_formatra1ek.pdfIn PDF document text
    • https://vogovolakufa.weebly.com/uploads/1/3/4/8/134874318/5063701.pdfIn PDF document text
    • https://votilolezin.weebly.com/uploads/1/3/4/3/134307270/2804641.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://zepizevut.atwebpages.com/biochar_thesis.pdfIn PDF document text
    • http://fukasutatota.rf.gd/vmware_workstation_version_12.pdfIn PDF document text
    • http://xutenujute.myartsonline.com/programa_de_auditoria_financiera.pdfIn PDF document text
    • http://vanilul.epizy.com/best_interior_design_sites_2020.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_off000115d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D8 5344 bytes
SHA-256: e80fc57f23cbd78366bb71525ed90ec4999c45b79e6ce2eb917b0efaf64a31f8
font_01_sfnt_off000127e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E6 12612 bytes
SHA-256: a3cb415afc456ce89c22add64df434954579d58d74a1e7e228ad679c3aa1647f
font_02_sfnt_off00015040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15040 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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