Malicious PDF — malware analysis report

Static analysis result for SHA-256 e73c2ae0016a022e…

MALICIOUS

PDF

42.8 KB Created: 2020-11-08 07:19:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: fdee8d82eef5a4e3a85cbeca6f176fc6 SHA-1: 34636f97125facdd783311557a42343ac11473b5 SHA-256: e73c2ae0016a022e6ec988d1a6bf7f3c0918a945b7995a69bbf0ccdcc17e5726
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://traffine.ru/123?keyword=unmountable+boot+volume+hp+windows+10 In PDF document text
    • https://veraweno.weebly.com/uploads/1/3/0/7/130739577/6462721.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/689241.pdfIn PDF document text
    • https://ririrufazerox.weebly.com/uploads/1/3/4/5/134501654/dewanikituj.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/4235858.pdfIn PDF document text
    • https://mosovokiz.weebly.com/uploads/1/3/4/3/134333023/pepujalunol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://tojurifison.files.wordpress.com/2020/11/12221151555.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d72c00ee-e88b-4253-b4a6-92633ff22931/bixuzibafuka.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/34786796543.pdfIn PDF document text
    • https://muvusunezoxo.files.wordpress.com/2020/11/kusavatotewivofovotusu.pdfIn PDF document text
    • https://donesowirolu.files.wordpress.com/2020/11/togopagokeg.pdfIn PDF document text
    • https://lopakog.files.wordpress.com/2020/11/wufivumumadutajof.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_off00006635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6635 5580 bytes
SHA-256: de972d486be19e690317de5a3a774a5c9494c2082fd82f7cfc84ee1e90c298f8
font_01_sfnt_off0000791b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x791B 10960 bytes
SHA-256: 55dc090c98af645a3874382700357c77ca127e9e25a4e7b84b5080e1553d68be