Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ec5cdb7428f3445…

MALICIOUS

PDF

44.1 KB Created: 2020-10-04 08:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: baa25c43a6d6e57dc51bd385cd6665dd SHA-1: 59f2cc683a9b3fd134e1850bd76fda4c73383aa6 SHA-256: 5ec5cdb7428f3445a0f3cb6abd78a61093c1bdc346f23133c699f281313d9cc2
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=commonlit+morality+as+anti-nature+an In PDF document text
    • http://vabela.ogdenblinds.com/uploads/1/3/2/7/132740405/wemomimoposuzalob.pdfIn PDF document text
    • http://files.chihongcasa.com/uploads/1/3/0/8/130873826/ef5f3.pdfIn PDF document text
    • http://linusixa.kawvalleyhearing.com/uploads/1/3/2/6/132681579/gepukor.pdfIn PDF document text
    • https://site-1036746.mozfiles.com/files/1036746/magokijudolot.pdfIn PDF document text
    • https://site-1036872.mozfiles.com/files/1036872/64182177324.pdfIn PDF document text
    • https://site-1038774.mozfiles.com/files/1038774/baganolofafovo.pdfIn PDF document text
    • https://site-1036862.mozfiles.com/files/1036862/voduzudo.pdfIn PDF document text
    • https://site-1043093.mozfiles.com/files/1043093/17336962111.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/d79d3dea-85c4-440c-8cd7-e937192c75e0/7354633415.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6aab49c8-7c7d-4866-9170-a98452f9bd37/57076996450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f106e56-f572-47d9-ae36-cd271308126b/74674757262.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6aa266f8-cb47-4887-abcf-1a944b0fdba6/95004541472.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9210df0-d68d-4327-9ded-1d2991a8b982/dinegomagududikokitu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97e00daa-4a20-4549-a3ca-b8f98f43e8e2/74233485134.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_off00006f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F39 4872 bytes
SHA-256: df54e4b231a3c94893079bf78427a970f82d52e10c39e7409b1311325cb4aa1b
font_01_sfnt_off00007fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB5 10308 bytes
SHA-256: c25c198189ce3fa1d1636cf485c646f01733f4914625f3816530c589156c718b