Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a3a20ddd26f217f…

MALICIOUS

PDF

44.0 KB Created: 2020-10-05 03:59:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 93d38f4cb79d9603f34bb3b7e26ec32b SHA-1: fd70fb64b5cae327ae5d788e14b73d71af61c6d7 SHA-256: 0a3a20ddd26f217feb7eec5663c0e14b99c864cbd1f6dc3313a5de52a6a6d052
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=uniform+building+by+law+malaysia+1984+pdf In PDF document text
    • https://site-1038650.mozfiles.com/files/1038650/paxizomukijexodidetol.pdfIn PDF document text
    • https://site-1038897.mozfiles.com/files/1038897/xuduvixidirusunixage.pdfIn PDF document text
    • https://site-1038714.mozfiles.com/files/1038714/mawipelezibalo.pdfIn PDF document text
    • https://site-1036848.mozfiles.com/files/1036848/zosado.pdfIn PDF document text
    • http://vipojad.4hvcoss.com/uploads/1/3/0/7/130739704/kenokibamepeb.pdfIn PDF document text
    • http://zanov.brightonelmtrees.com/uploads/1/3/1/0/131070331/7554142.pdfIn PDF document text
    • http://files.marietremouletphotography.com/uploads/1/3/1/4/131437982/1147382.pdfIn PDF document text
    • http://files.thefeltfactory.co.nz/uploads/1/3/0/7/130776841/xizixexa-dajawotubep-fekifomidele.pdfIn PDF document text
    • http://files.midohioownerhandlers.com/uploads/1/3/0/7/130739147/4957846ebbc.pdfIn PDF document text
    • https://site-1041183.mozfiles.com/files/1041183/70199786773.pdfIn PDF document text
    • https://site-1036745.mozfiles.com/files/1036745/86501068777.pdfIn PDF document text
    • https://site-1039779.mozfiles.com/files/1039779/jikobijunipopikiwelexel.pdfIn PDF document text
    • http://files.northstarholistichealth.com/uploads/1/3/0/7/130739153/bixamijuvexoneweg.pdfIn PDF document text
    • http://xebipitul.whitelabelbridal.com/uploads/1/3/1/3/131379290/nuvojojetiwozake.pdfIn PDF document text
    • http://files.fbazin.com/uploads/1/3/1/4/131437516/xugaw-pijojisobokez-lazevezi-faxexikev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00006bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBC 6176 bytes
SHA-256: 1a151b9022d038c1bec19e33cce1f376df690caefb6f653506fdaf3a0ff4dbba
font_01_sfnt_off000080bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80BD 9872 bytes
SHA-256: d208f717b3cf73cda4189427442808f6b1eb19e18b3241915cecd371007ff7bd