Malicious PDF — malware analysis report

Static analysis result for SHA-256 7592b759fe6c51ff…

MALICIOUS

PDF

46.1 KB Created: 2020-10-18 16:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ecf6c4f4adbd74923a0ea055d2da7c9c SHA-1: d2e8d4a834b98a2b85b539505cdb7365fecd7553 SHA-256: 7592b759fe6c51ffa7a271998c2c8c95b4c6c754f2fc4921ad4226eb4fb63e01
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://ggtraff.ru/123?keyword=washington+state+boaters+license+study+guide In PDF document text
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/domijedaxixak.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/6069273.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/daxipinepejul_pesev_wefovi_bexawobawu.pdfIn PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/rawuworo.pdfIn PDF document text
    • https://jugoruzaja.weebly.com/uploads/1/3/1/4/131407370/8472881.pdfIn PDF document text
    • https://pevinuwipe.weebly.com/uploads/1/3/0/8/130873962/bezaxiwewodi.pdfIn PDF document text
    • https://gumomamomav.weebly.com/uploads/1/3/1/3/131398069/jegiwetigadugalod.pdfIn PDF document text
    • https://rojusonevupa.weebly.com/uploads/1/3/0/8/130814232/5c8886170d.pdfIn PDF document text
    • https://kufazijofiw.weebly.com/uploads/1/3/0/7/130776126/kovilibajagite-jotuxe.pdfIn PDF document text
    • https://jabiratunibi.weebly.com/uploads/1/3/2/6/132683422/92e1dbf6322.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370533/normal_5f880b5a1c6ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376375/normal_5f8ac03a440cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f87143fa193f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382614/normal_5f8be916a543b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8273/6309/files/happy_tree_friends_petunia_baby.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8987/7405/files/who_gives_this_woman_to_be_married_to_this_man_script.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2433/4496/files/witikibumamipitiri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a0e2e84-c3c1-4697-ba35-037c6513e934/toditekemoninabosepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3de8c6b6-a0e8-49f6-9e1a-7c223c8c00b3/81769478156.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57784940-7588-4baf-a4cb-8456c82e5c8c/2078061726.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07bc57d7-f14e-403f-9772-21567a34a92b/60250240569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a59c33cc-8bdb-42a2-849a-d6a2f380adb4/mixalaxag.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_off00006ce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE7 5456 bytes
SHA-256: 52498edd304ff422aab9b5d4ff7409734190552eafde1a885a37e2377235f2dd
font_01_sfnt_off00007f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F70 13444 bytes
SHA-256: 76a4fe8ed7e96e4662b56090f37d8295f0fbd2c80228e926b197c96276fc62b2

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