Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc9bb0b2d4af1337…

MALICIOUS

PDF

76.2 KB Created: 2021-04-05 13:52:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 760dd2046c458bfab4feb191b35b91f4 SHA-1: 5a81aa5c3b4f8876f28ab5660bae243de7e57798 SHA-256: dc9bb0b2d4af133756c1db1dc9e2b72e0fb39f5be84f9281340de495d7df04a4
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to Weebly-hosted PDF files, suggesting a link farm or a method for distributing further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and extensive external links are indicative of malicious activity, potentially leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://baarspo.ru/strik?utm_term=tabela+fipe+de+carros+usados+rj PDF link annotation
    • https://nagiwavimev.weebly.com/uploads/1/3/4/6/134612684/teniko.pdfIn PDF document text
    • https://kazusabetife.weebly.com/uploads/1/3/5/3/135318045/womiz.pdfIn PDF document text
    • https://wefupavoxed.weebly.com/uploads/1/3/2/6/132682659/muxegoxogojus-nivanuluxef-noxubupotepubes-lorapud.pdfIn PDF document text
    • https://derajuxojop.weebly.com/uploads/1/3/1/4/131452827/zimepuxubulogonumefu.pdfIn PDF document text
    • https://topekaje.weebly.com/uploads/1/3/4/1/134109010/0edf4f.pdfIn PDF document text
    • https://nopubileluzozu.weebly.com/uploads/1/3/5/3/135389839/751722.pdfIn PDF document text
    • https://fewibiwovenekip.weebly.com/uploads/1/3/5/3/135327418/7586014.pdfIn PDF document text
    • https://buxutagugumazas.weebly.com/uploads/1/3/4/0/134095839/4875913.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/sigobija/pathfinder_pawns_bestiary_box_1.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/ginimolaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/crime_prevention_strategies_in_south_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/tiwona.pdfIn PDF document text
    • https://734e8db3-b9db-457c-abaa-08c06218e7ae.filesusr.com/ugd/f6bb82_155f4ce6f5af48d5929df5d13f3a302b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/32762472952.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/23332575927.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/creative_website_templates_for_software_company.pdfIn PDF document text
    • https://5f8b0e40-2141-4341-98ab-6145db4b8156.filesusr.com/ugd/2072cd_3ea54bf8fa044d19b100c8a2108f5281.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/aha_german_longsword_study_guide.pdfIn PDF document text
    • https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_10e780480a824cc8aff3ca54808250f7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nagudo/93980667357.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/gabeza.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/convert_to_word_documents_free_online.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/acer_laptop_price_in_india_2021.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_off0000e58e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58E 5316 bytes
SHA-256: 3458ff07d696ab656dec57dc9516cf314421194532fc87a8d66af958aacc3599
font_01_sfnt_off0000f7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AC 14084 bytes
SHA-256: 54a8919b0ce5d30ce5fef7a018031713118c02ee01435fae0cc01f18390e8505

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