Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6b87d2fc26553da…

MALICIOUS

PDF

144.3 KB Created: 2020-11-14 19:21:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3fa4195f3588dd9beff146e309346ff4 SHA-1: beebb80ca19c4d4404e4b8989996ed887e01f506 SHA-256: d6b87d2fc26553dab12b9d464c1b942d059992cdf92bbaed102d9554ab76ddc1
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One critical heuristic identified a link to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

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
  • 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.
  • 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.
  • 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://gettraff.ru/strik?utm_term=yamaha+fjr+service+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369494/normal_5f8e68a7aad9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367964/normal_5f8ba3733b1f6.pdfIn PDF document text
    • https://kisuguwaki.weebly.com/uploads/1/3/4/3/134388310/5014640.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381973/normal_5f8e430397fbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385850/normal_5f8c7e8438c02.pdfIn PDF document text
    • https://wazijewafaset.weebly.com/uploads/1/3/4/4/134437152/669264cfa1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5f8db669d3d9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416128/normal_5f9c8b6ff0bfb.pdfIn PDF document text
    • https://xelenupexom.weebly.com/uploads/1/3/4/4/134480667/f4a85f836d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405638/normal_5f9e30a285a9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369306/normal_5f880b33a19fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417030/normal_5fb00cd65bdda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389570/normal_5faa037f473bf.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/zekalujenopavib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366958/normal_5f8a4e4dcfe64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375889/normal_5f8dc92259410.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/5fc329be-68e6-4ec9-8306-c6bfd361aff0/65095387579.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_off0001ea00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EA00 5220 bytes
SHA-256: 9041cb0e650c98f22b9109f489868b5fe70b7dddc8f66c801c26dbfa175bbd89
font_01_sfnt_off0001fba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FBA6 17500 bytes
SHA-256: c6a63f29844a1edd930be20d0ddcea3deee30b3fdc9ecae353c1bd704843517d

Open this report in the interactive analyzer, or submit your own file for analysis.