Malicious PDF — malware analysis report

Static analysis result for SHA-256 d66ebbcbbac0c097…

MALICIOUS

PDF

74.4 KB Created: 2021-03-18 12:12:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d3e88c97209a640322fbe6a500f567e4 SHA-1: 34dc87e98da8dacb1d326f2a654fa98af47d3c42 SHA-256: d66ebbcbbac0c097cbbe0cd556646c3f3fb5f33cdb47181765dba5826e6024d2
156 Risk Score

Malware Insights

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

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 0.9998

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 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.
  • 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://botokaw.ru/aws?utm_term=divorce+in+the+old+testament PDF link annotation
    • https://doxorovovo.weebly.com/uploads/1/3/4/4/134479089/binolewezifolez-nasibasedum-firapavi-zitidiwe.pdfIn PDF document text
    • https://xipezote.weebly.com/uploads/1/3/4/8/134882979/42435.pdfIn PDF document text
    • https://bunonosuvon.weebly.com/uploads/1/3/5/9/135976801/3899825.pdfIn PDF document text
    • https://roxilegetewus.weebly.com/uploads/1/3/4/7/134721251/mesalarigilubu.pdfIn PDF document text
    • https://mufepubawitig.weebly.com/uploads/1/3/4/6/134614790/tobitosewaw_modim_vizuwumemad_vopud.pdfIn PDF document text
    • https://ranenowubugipo.weebly.com/uploads/1/3/4/0/134040983/lowisotir-sogoke-wasedij-mutipefowowa.pdfIn PDF document text
    • https://gitikaru.weebly.com/uploads/1/3/4/9/134901111/6008031.pdfIn PDF document text
    • https://xitititoludazo.weebly.com/uploads/1/3/5/9/135987602/kuniwid.pdfIn PDF document text
    • https://gixoxiri.weebly.com/uploads/1/3/4/7/134707295/30590.pdfIn PDF document text
    • https://vuzodafolo.weebly.com/uploads/1/3/4/7/134732359/b062a42bf185.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/pokemon_super_deluxe_essential_handbook_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/graphing_parabolas_in_vertex_form_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/anaerobic_digestion_of_biomass.pdfIn PDF document text
    • https://9a4b5e96-23fe-4021-9525-787506808755.filesusr.com/ugd/b3318b_c6342871571446aa8d70be7e17adc0b5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/bijuzaxigu.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/zotilodaxezosejudul.pdfIn PDF document text
    • https://123949be-7110-4ba3-a240-a7df06fb38ce.filesusr.com/ugd/80fd5d_a677346b4fa64ef7845864d5923b00d0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/narasimha_audio_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/crystal_reports_designer_2011.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_off0000e6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A2 5236 bytes
SHA-256: 05cae7132ac294ba1a16bacc62e87664c390881a85898ae50fd75d41b5c8eadd
font_01_sfnt_off0000f853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF853 10216 bytes
SHA-256: 7561b8973b60d212bd120ebfa65f4798ef928bd70d760414b6d06427cf27fcd7

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