Malicious PDF — malware analysis report

Static analysis result for SHA-256 067ced375bc49f16…

MALICIOUS

PDF

82.8 KB Created: 2021-03-15 14:02:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 4bf412744ecd64be3f78c1d22c02bea0 SHA-1: aa0c35ffc7a8da04bd84bcaa9417ba4a29c207c5 SHA-256: 067ced375bc49f16edc00657436d13235ae11f6851815e3edde09193f06283e1
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a common tactic for link farms used to distribute malicious content or conduct phishing. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://vilenefex.ru/award?keyword=cell+city+analogy+pdf+answers PDF link annotation
    • http://garobunatuxovi.scienceontheweb.net/58506173360.pdfIn PDF document text
    • http://myirn.icu/how_to_drain_a_cabrio_washerx5pzr.pdfIn PDF document text
    • http://lejidakoxinetog.mywebcommunity.org/causas_de_esclerosis_multiple.pdfIn PDF document text
    • http://vamoktin.ru/22923704038j07qn.pdfIn PDF document text
    • http://zathkatow.xyz/reset_ink_pad_epson_l5190kqnet.pdfIn PDF document text
    • http://luzibis.iblogger.org/sadlier_vocabulary_workshop_level_b_answers_unit_15.pdfIn PDF document text
    • http://tryporte.xyz/best_penny_stocks_to_buy_right_now_canadax2lo4.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
    • https://24218389-b518-4ca3-8548-65eaf758daa4.filesusr.com/ugd/c836c3_bf583c42eca242c4a4586ce5fd794fb9.pdf?index=trueIn PDF document text
    • http://fizufizobizud.epizy.com/44739800486.pdfIn PDF document text
    • https://506dbbd1-d4b3-44b1-a4c9-6b5d0cab6a23.filesusr.com/ugd/c75f60_4b9a28c14d1548f6a1b28624b4430673.pdf?index=trueIn PDF document text
    • http://zuvuzevo.atwebpages.com/fajajak.pdfIn PDF document text
    • https://44407f20-7244-4107-9544-84d8151b6f9a.filesusr.com/ugd/8508de_dbf4d0f9ca0749cf838f9484d1fb28fe.pdf?index=trueIn PDF document text
    • http://rilulavonepuv.epizy.com/first_birthday_templates_free.pdfIn PDF document text
    • https://a6f18165-9bfd-46c9-8f51-0ab50cd0b687.filesusr.com/ugd/265c7a_28ea6639f5214bf98f363bd6ea8490c8.pdf?index=trueIn PDF document text
    • https://b24036c1-08f6-4d5b-b8c9-f4c47f26e437.filesusr.com/ugd/ae9acc_168161d235924813b3ee4b7e5a74d6e2.pdf?index=trueIn PDF document text
    • https://04934832-22f3-474e-96de-b9d593e92251.filesusr.com/ugd/f390e7_2e465f2dcbe74e0b8315a692a2b67d47.pdf?index=trueIn PDF document text
    • https://2b08c346-38d8-4763-b559-bb9d4fff2313.filesusr.com/ugd/40c9d6_f0199e1ff4e6442aa95ce8183d375eae.pdf?index=trueIn PDF document text
    • http://simarawi.epizy.com/cauchy_schwarz_inequality.pdfIn PDF document text
    • https://1e1f235d-56dd-4976-b20d-d38e3fe7b172.filesusr.com/ugd/210b45_4738dedf3d6d473bb3701b27bd1ba7f0.pdf?index=trueIn PDF document text
    • https://1ac5d900-0c69-4f12-8b1d-4e209472b8d2.filesusr.com/ugd/828753_7716073573fa4778a664e53ebd6f1b18.pdf?index=trueIn PDF document text
    • https://034618a9-9b39-4f41-ad18-95bca1d1c80b.filesusr.com/ugd/48d9a1_ebd7006faead4f53aeddc70845c84942.pdf?index=trueIn PDF document text
    • http://redepulevinevux.epizy.com/printable_paper_bag_puppet_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/wupetugufegemem.pdfIn PDF document text
    • https://s3.amazonaws.com/zexozavo/como_elaborar_un_mapa_de_riesgos_en_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/jorupavedefubamepinik.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/kodoneladati.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_off0000f6f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F8 5328 bytes
SHA-256: a2104dd87e38a4fc55acd8ff5fecd81760bb985d24d8ac3bfe6d32f9e23cd0dd
font_01_sfnt_off0001093a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1093A 10676 bytes
SHA-256: d5c35ca40a32c850e28fd5b32b53178407ec947b96d5a1519788ee37f255595b
font_02_sfnt_off00012da9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA9 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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