Malicious PDF — malware analysis report

Static analysis result for SHA-256 88393e78218b5172…

MALICIOUS

PDF

49.0 KB Created: 2020-10-19 08:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 7c2358f982d4d8424a65e97559e48956 SHA-1: 61c328dae0fbc396ee78c975ad2ba92c8cf1913a SHA-256: 88393e78218b51723618a8c3ed182feea8de6146eb85eb343ae27548005191d8
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=recursos+graficos+de+un+reglamento In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5f8b1e4a0069c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383930/normal_5f8cc0950b61a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384028/normal_5f8cb67da569a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374372/normal_5f8a189fe94b0.pdfIn PDF document text
    • https://kiseridebajesa.weebly.com/uploads/1/3/1/4/131408791/44ea53c4a.pdfIn PDF document text
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/kinogubeta_jazuvijedajote_laweburilud.pdfIn PDF document text
    • https://jasazifo.weebly.com/uploads/1/3/1/4/131437377/zurukuxidiro.pdfIn PDF document text
    • https://tudupumodowi.weebly.com/uploads/1/3/1/4/131406798/b726ec796bb5.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/filosom-lusiwikafese-jerupuxorukoti-novubolifunuw.pdfIn PDF document text
    • https://pisanofinupu.weebly.com/uploads/1/3/1/4/131437881/pazigi_vojelap.pdfIn PDF document text
    • https://fobewesepujub.weebly.com/uploads/1/3/2/3/132303403/81da3448fb64dc.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/3669356.pdfIn PDF document text
    • https://suzokixuvajix.weebly.com/uploads/1/3/0/7/130776208/1386370.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384150/normal_5f8cec61b6d8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370057/normal_5f88905457703.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f88b4fd60d46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5f87c90fa38fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368493/normal_5f8883bb27b17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365649/normal_5f871bcc7c674.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_5f87812d271a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5f8802db7fc77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365649/normal_5f8774fd63197.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/299801d6-d75e-4910-9a5b-1dcbff2fd2c8/xitomezetitesewopak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52f9202f-474c-462d-8061-4ec6ff50ac99/53767205682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecb5b0fa-55ae-4b27-97e5-607da4295d1b/sogutiwamepez.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_off00007c5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5E 5348 bytes
SHA-256: 36d3b2ac9da872fef14bcc52ec4c9106fcf2be9a363d40304aec1658b676524e
font_01_sfnt_off00008e70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E70 11680 bytes
SHA-256: 78ec38ce6efb0c512fc8b5f74ce06ed12d2dedef6d0a79eab4f99b7fa5cfaed3