Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f417d4115b91023…

MALICIOUS

PDF

71.5 KB Created: 2021-03-05 14:27:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d4e6d7b044f1bb991f002879c6182bc1 SHA-1: 5895ded17acb44bd695449ab0bfd12b10b20a804 SHA-256: 2f417d4115b91023a7af81909647191fe0f3e7aa4658c07a8cf9764a0dfca795
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

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 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://gimoguvi.ru/strik?utm_term=operating+life+cycle+costing+ppt PDF link annotation
    • http://jekeluxuto.mywebcommunity.org/80093517081.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381547/normal_6024299d1b224.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/tommy_emmanuel_tall_fiddler.pdfIn PDF document text
    • https://wonikisemuk.weebly.com/uploads/1/3/4/9/134902350/5176aa752486e.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/libro_teoria_de_las_inteligencias_multiples.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389366/normal_603e7c7ca8749.pdfIn PDF document text
    • https://muzitotixigo.weebly.com/uploads/1/3/1/4/131407705/fogeluxasi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390999/normal_602f1e8f85c8e.pdfIn PDF document text
    • https://gavokafiwafez.weebly.com/uploads/1/3/1/3/131381231/cacf5df472e.pdfIn PDF document text
    • https://ruwivogisi.weebly.com/uploads/1/3/4/2/134265822/fa3e42cb4563ad4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486374/normal_5fd286200765d.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/gedexim/information_system_engineering_vs_software_engineering.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/fortnite_bingo_sheet_creator.pdfIn PDF document text
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_ce8c4c340de04e0a91e1cb43b3508ca5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/address_html_form_example.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/lewaso.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/66757537492.pdfIn PDF document text
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_f4f65ba08036427b92ccfddb344e65de.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/nejibigulekugupokoji.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/black_mens_long_hairstyles_2020.pdfIn PDF document text
    • https://9df6fdd8-df71-43fb-87ad-b121b2de7416.filesusr.com/ugd/e0d0cf_28b01d3762e0424984070e909c8f5ad9.pdf?index=trueIn PDF document text
    • https://7fd92c66-d3af-485c-b7a9-31529ddfb1b5.filesusr.com/ugd/997d0f_05dd945d681e48faa0f448853c397593.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/where_is_the_power_steering_reservoir_on_a_2007_chevy_malibu.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_off0000dcef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEF 5312 bytes
SHA-256: c9bf5e7f15d50b16d77a062640af96451669e90e51dd19232ba8bda07e1d0daf
font_01_sfnt_off0000ef17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF17 9892 bytes
SHA-256: e3c7e5c13429dfe872a4543db5eb73d243dfee6f91ba957f7a812fb0ecc1c857

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