Malicious PDF — malware analysis report

Static analysis result for SHA-256 4acdf0b5e0ed74d8…

MALICIOUS

PDF

41.9 KB Created: 2020-10-05 14:09:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 47fbe1b86376d3a4f0907582081f7f7e SHA-1: 50280d107115c0a84b4bf16c8f9173df048d618b SHA-256: 4acdf0b5e0ed74d8a45b86d4801e0768e15265ec2e5d7298afe4f57b4d95cce7
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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=el+arte+de+proyectar+en+arquitectura In PDF document text
    • http://xajuw.allforkidscenter.com/uploads/1/3/1/0/131070867/nefivuzuk_tuduramevito_vefipelade_fugimarituw.pdfIn PDF document text
    • http://files.latteriasocialegonfo.com/uploads/1/3/0/9/130969353/fuwawenu.pdfIn PDF document text
    • http://vowewit.music8agency.co.uk/uploads/1/3/1/0/131071157/satipe_vomozupefut.pdfIn PDF document text
    • http://files.carolinerosenblum.net/uploads/1/3/2/6/132682974/bb91034cb84d6.pdfIn PDF document text
    • https://site-1039719.mozfiles.com/files/1039719/tajumojevoruzojibonokabi.pdfIn PDF document text
    • http://dafoge.thewonderfuelcompany.co.uk/uploads/1/3/1/4/131454766/9750324.pdfIn PDF document text
    • http://files.tx-20081afjrotc.com/uploads/1/3/2/7/132740747/pumenarogare.pdfIn PDF document text
    • http://sujexize.regantempleton.com/uploads/1/3/2/6/132681352/punapirifiluxu.pdfIn PDF document text
    • http://files.thearcadephoto.com/uploads/1/3/0/7/130740117/xegute.pdfIn PDF document text
    • http://files.historywithmrw.com/uploads/1/3/0/7/130775339/1519296.pdfIn PDF document text
    • https://site-1038583.mozfiles.com/files/1038583/55419387441.pdfIn PDF document text
    • https://site-1040504.mozfiles.com/files/1040504/fazekatujuratelekiku.pdfIn PDF document text
    • https://site-1036872.mozfiles.com/files/1036872/pitusozesitu.pdfIn PDF document text
    • https://site-1043207.mozfiles.com/files/1043207/48314326077.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00006221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6221 5076 bytes
SHA-256: 43256acf702bb0c4aa7bf3b4d6fcfc156ac417bab5c1d7482e2de79813ad6302
font_01_sfnt_off0000737e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x737E 11784 bytes
SHA-256: 895adf3b4c359663511f544e5d5cb1b684b20b25c5f3b31d6e06cada63c05479