Malicious PDF — malware analysis report

Static analysis result for SHA-256 172f5cb6d544b42c…

MALICIOUS

PDF

45.8 KB Created: 2020-10-13 09:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 13f8f7c28c0d7928700740c75e8af0b2 SHA-1: 6035131e46dc7e62ac95477d4da1872f53b358eb SHA-256: 172f5cb6d544b42c99bc2bf510327fe90e174dcdb57616b0556998b9fa038cc8
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=pulmonary+circulation+anatomy+pdf In PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/duwivif.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/1696278.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/lanadez.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/0c18874847f.pdfIn PDF document text
    • https://site-1037164.mozfiles.com/files/1037164/89366438966.pdfIn PDF document text
    • https://site-1036798.mozfiles.com/files/1036798/48351211271.pdfIn PDF document text
    • https://site-1043520.mozfiles.com/files/1043520/5574665222.pdfIn PDF document text
    • https://site-1037886.mozfiles.com/files/1037886/93425364773.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/0a4e8407-5451-4ad9-8e62-795ad0dc2ddb/12941664800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/633f4473-be01-405b-98b5-de530d6d5c95/66951820096.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c11d9358-fdb6-4e1d-abe9-9dc65c78c6be/64926396553.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef3ec387-2ede-46f0-ad71-d8ea7db7dfb4/6719184707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9048d9fc-8a5c-4cba-af1b-855fc70517b5/48196938392.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4df951a8-cf6a-4f60-b5ca-79cf6a5056e1/kofurokaforofekinixeta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57d40575-32bc-48eb-b1a8-1097120d71f3/87529229632.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7831b6ce-d6f1-49e3-88dd-f14128a9b86c/kagejepareberu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76E1 5224 bytes
SHA-256: 59224aa637e8ec2483a9a6844241f2e3773217f9f384e637a6e9b8c8dc93031d
font_01_sfnt_off00008899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8899 9980 bytes
SHA-256: 709f5a27c3b74bc09f206fd8a47d7f03faf99594469bf8ff12074cfca65ed1d2

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