Malicious PDF — malware analysis report

Static analysis result for SHA-256 46db1f16bf0520cc…

MALICIOUS

PDF

72.8 KB Created: 2021-03-18 01:26:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 51df0254878e6ae9a6dcaed6a786ee85 SHA-1: 2d0d09828a9e285f27cec8ea00eb256a51e06929 SHA-256: 46db1f16bf0520cc2b62f9778f18bdd49a5d86ad0aacab7493356a2835b32ea1
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs and the nature of the heuristics point towards a phishing attack designed to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/strik?utm_term=dyson+cinetic+big+ball+multi+floor+best+price PDF link annotation
    • https://cdn.sqhk.co/dolafita/jgigoCT/pureg.pdfIn PDF document text
    • https://mixodozom.weebly.com/uploads/1/3/4/3/134333910/sixumevudan-piwudo-wetorag-luwojipolo.pdfIn PDF document text
    • http://zogometemo.sportsontheweb.net/ancient_egypt_books.pdfIn PDF document text
    • https://donaxitod.weebly.com/uploads/1/3/4/6/134688316/tudilememoxir.pdfIn PDF document text
    • https://cdn.sqhk.co/sivadapexiri/geib6Dm/48506942393.pdfIn PDF document text
    • https://cdn.sqhk.co/dodagirojep/jbVijlS/starcraft_boats_aluminum.pdfIn PDF document text
    • https://cdn.sqhk.co/bogebumemilo/5gdvnjd/zopozizidijowinox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470385/normal_5ff323887444c.pdfIn PDF document text
    • https://cdn.sqhk.co/samojusive/ggghihs/31209867602.pdfIn PDF document text
    • https://cdn.sqhk.co/kafekogi/ODieNtg/prime_video_movies.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369928/normal_602ac71f45e9f.pdfIn PDF document text
    • https://sabadefupi.weebly.com/uploads/1/3/4/3/134345863/wewipenerigo_sebok_vowazivik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8a89c5bc-485b-4808-980c-66c60e8d9908.filesusr.com/ugd/834936_2cc1755cf7134bf38a42741ae7c22c44.pdf?index=trueIn PDF document text
    • https://e49cd12a-7e53-4a25-9f98-ae37b5ff2e44.filesusr.com/ugd/35dc59_5a51b867c92f4d608180f25c81e48751.pdf?index=trueIn PDF document text
    • http://firiwigisu.atwebpages.com/95266688744.pdfIn PDF document text
    • https://4cf2acc4-d143-4013-a78d-f21de0873c4f.filesusr.com/ugd/e4636f_4767a01db14d4cd7ad4e20bae0f94c61.pdf?index=trueIn PDF document text
    • https://f499a9ea-5579-4d3c-a180-ba191067f9b7.filesusr.com/ugd/34ec99_5939dc58d4f94ceb92323e4ba49d8e53.pdf?index=trueIn PDF document text
    • http://jukasuxoseki.atwebpages.com/52156752703.pdfIn PDF document text
    • http://vujuvisesakok.myartsonline.com/43640903345.pdfIn PDF document text
    • https://6d4a8fb0-9a8a-4850-8aa1-2b5706121c9a.filesusr.com/ugd/ff2e72_c137c8a6305f49ac94d43526043b9bc5.pdf?index=trueIn PDF document text
    • http://tiluxusimutine.atwebpages.com/bavunoxesopaf.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_off0000d9e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E5 5576 bytes
SHA-256: f3f7352d3ee8d7ea01b509132ffac93f1e07019c2a41ad08e46df9a39b1216d7
font_01_sfnt_off0000ecd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD8 11956 bytes
SHA-256: cee6150408d0eb6644d5866cbbd5b1514bd8451209f36748c77aadb477c15e4b