Malicious PDF — malware analysis report

Static analysis result for SHA-256 e79ea46e673b9e1a…

MALICIOUS

PDF

45.5 KB Created: 2020-09-29 23:32:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2288e1e39878337eec4b45152e5067a2 SHA-1: f7c5ae17c4593d6e4599650c91b5a2639557c7df SHA-256: e79ea46e673b9e1afa907b3fd560b3378a789d326fb93a04388c830a750abd5f
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=antigone+critical+analysis+pdf In PDF document text
    • https://site-1036719.mozfiles.com/files/1036719/munor.pdfIn PDF document text
    • https://site-1036929.mozfiles.com/files/1036929/lazoposinijedozebipasaget.pdfIn PDF document text
    • https://site-1037035.mozfiles.com/files/1037035/kavagi.pdfIn PDF document text
    • https://site-1037178.mozfiles.com/files/1037178/wobalimu.pdfIn PDF document text
    • http://sopikatus.eastgwentreferees.com/uploads/1/3/1/6/131637419/fojusapimukerirug.pdfIn PDF document text
    • http://files.gunkhoney.com/uploads/1/3/1/4/131407194/1210648.pdfIn PDF document text
    • http://files.entreprenorth.ca/uploads/1/3/0/8/130814238/9abf0795cbd1.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/e2de0791-aaf3-43d7-8354-ee4812de3184/16586253295.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8a358fd-2947-4c41-b640-46a1f0cbafc0/vezoxuto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9b8206f-e70a-4c66-a12c-90bf9414567d/sujedo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f58037be-2bfc-46e4-9140-ee54924af384/peguxedikoxosizolopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4792d2b-57d3-40a9-8dce-88f81767cc23/4212553352.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4836/9319/files/carbon_nitrogen_and_their_compounds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0943/9906/files/cara_membuat_template_blog_keren.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/15427463803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8130/9085/files/90429684988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1284/0862/files/rawuxenopatalox.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_off00007456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7456 5416 bytes
SHA-256: 41a14d0f5b3aaacee3d68325ffb7b1accb4c72233921095a85c190d651194011
font_01_sfnt_off000086e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86E5 9964 bytes
SHA-256: b6e3503c242f17e1237ae30a34fccbad71762c0147faa38e110da0e1f5b2a35f

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