Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a0487e88ab494e…

MALICIOUS

PDF

65.1 KB Created: 2020-12-31 04:06:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 4cc7b33759f4214f76399debc93468a8 SHA-1: b4d33975ccf6eac2f249eff24e0a745b299146ff SHA-256: 96a0487e88ab494e8a96d9050dd197cd3ddfad09bb6d0e487abe92eed4230b13
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 0.9998

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://trafftec.ru/strik?utm_term=%25D1%2582%25D0%25B0%25D0%25BD%25D0%25BA%25D0%25B8+%25D0%25BC%25D1%2583%25D0%25BB%25D1%258C%25D1%2582%25D0%25B8%25D0%25BA%25D0%25B8+%25D0%25BF%25D0%25B5%25D1%2581%25D0%25BD%25D0%25B8 PDF link annotation
    • https://rubebipanisoju.weebly.com/uploads/1/3/4/7/134735256/kivanedasukerajaj.pdfIn PDF document text
    • https://bugedosase.weebly.com/uploads/1/3/2/7/132712019/figugod.pdfIn PDF document text
    • https://gejatovuri.weebly.com/uploads/1/3/1/4/131406669/vatopudomi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/385b6812-ccc2-4996-bf41-dcd818dd7e2b/9235403427.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/5053093755.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80c5fed5-f8da-4e34-acf1-aa04137ba3a6/keygen_eobd_facile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5bb71f0-4fd7-4b64-80f5-5ed73e903f51/61837439587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9c54435-4d57-403b-8bae-e4ece82460d3/sinaxonivot.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/baradojumawutixizaju.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/super_sailor_chibi_moon_transformation.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/argon_html_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/599e2e23-e11b-4f28-a56f-a6ec0aaa8139/99574265566.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/bimurubawomixad.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/crowning_with_thorns_bible.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/arabic_calligraphy_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/handbook_alternative_energy.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_off0000b6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6B5 5248 bytes
SHA-256: d3a2d37ba397c285ae343f774d3ea5d332f910fd878186cd5b7c229a93771cbb
font_01_sfnt_off0000c867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC867 14720 bytes
SHA-256: 09d7287f4b389e56a7b2b55580ea7c7f3c90fb5275c68f5755afaf76f617f44c

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