Malicious PDF — malware analysis report

Static analysis result for SHA-256 28a39f8278c550f7…

MALICIOUS

PDF

56.7 KB Created: 2020-10-15 17:02:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e58577bed0a128d46b3a00f988ff9770 SHA-1: 21c71786429e0594f92c17d3957e7696baee41ad SHA-256: 28a39f8278c550f71306b6c781262a8a7f432f3a26a62d1869c389a8b366e588
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=hospitality+industry+award+pdf In PDF document text
    • https://gozofuma.weebly.com/uploads/1/3/0/8/130874065/395db4f.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/foburadip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5f86fa7d04641.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366302/normal_5f877f04f14a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368745/normal_5f87a59076167.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_5f87adfd07045.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f87cdac01f2e.pdfIn PDF document text
    • https://site-1039289.mozfiles.com/files/1039289/taravuzinaviwogax.pdfIn PDF document text
    • https://site-1043160.mozfiles.com/files/1043160/kawusikurobenoze.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/nukexifepejisox.pdfIn PDF document text
    • https://rabexowubomisuw.weebly.com/uploads/1/3/1/4/131407155/buduxofupigolov.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/dolopitubolagu.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/0d813a19-deca-4800-8a31-b9856fcf0b9a/lofasefukofilabevoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36dd8fcd-db9f-4080-8308-08cd81721e63/xofiwokemerebilimozox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3914816-b4eb-4283-8a04-508034462677/sumuporaraxakobotetez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/677bd1a6-6252-4462-a02e-bfddc71ca255/92680832976.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/711abed6-34de-48b3-a7e7-a0ea8d54666c/delufazurad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af6d8cb8-2e8b-431a-b3cc-41386df4251b/jugulelisuwexavujefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad8348bc-5d55-49e3-b171-8369dff2894c/70317621522.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0644d85-33df-4668-87e3-1b5c2bba21c7/89800041414.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62fd7984-851d-4cc9-9cf8-c9fb735163bd/77386192466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77d3ac66-b6ec-4364-8f37-f3da2ea538dd/fipitusebegeferufi.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_off00009ea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EA6 5188 bytes
SHA-256: f5c7adac627480991a7cd58e18e1f369a5aeafca9e1506fa907792d8bc03487b
font_01_sfnt_off0000b06f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB06F 10748 bytes
SHA-256: e428be80b4a0895cccb81c3cb3bfd40bdd5a78cf76f9a36d2ddbed18a47d34f8