Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1f17078cb4ed6c4…

MALICIOUS

PDF

34.2 KB Created: 2020-11-04 10:48:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a0363cff60fe94a18a6955821b5766e4 SHA-1: d3fb266f1b0418e54dd68723216b6639106543ac SHA-256: a1f17078cb4ed6c4695d05245718d74db37fcdfb2bd1bc5179184520a965360d
94 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 an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/strik?keyword=k+of+c+hallettsville+texas In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376372/normal_5f8c92e03f32c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f88bab28d32d.pdfIn PDF document text
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/rozibeju.pdfIn PDF document text
    • https://kexazupaxi.weebly.com/uploads/1/3/3/9/133997339/707c387c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366302/normal_5f97d95a6f487.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372702/normal_5f88c988e12b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382965/normal_5f8d36de8cf4f.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/c92cb611-f0db-4900-b996-73fb6839da1b/dixezedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48c21a07-188a-4962-acfc-c0e492536bef/zaritupesiwapevojavotex.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/30528686337.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/displacement_vs_time_graph_find_velocity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/471f79cf-e406-4645-aab8-8af5b05db861/90198625256.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97558827-227a-4d13-9337-d936e4282f65/hillsborough_county_school_holidays_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77adc5ef-a803-40e3-bfce-b6f3313f8876/jaxixifu.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/29161508360.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_off00004961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4961 4972 bytes
SHA-256: 4b9597254356a02a5117f3229d7d0473a871b922c5560312cecbe314c5079a8c
font_01_sfnt_off00005a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A5F 9928 bytes
SHA-256: a35f4eb6cf8d9c66e785dc6120976babb14913f64dc246f112d21509d1e08edb

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