Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b8965bccd244f3f…

MALICIOUS

PDF

42.9 KB Created: 2020-10-11 03:07:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6caffc93f14687fa9c8607c870ef5c47 SHA-1: 8a27e4bb33187da89f777b7bec413de82a3a2ee5 SHA-256: 5b8965bccd244f3ff98f94e20092517e4453c87ab3ecf162bbfdf504f2dda67f
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://gettraff.ru/strik?keyword=principios+de+refrigeracion+roy+dossat+pdf In PDF document text
    • http://files.piercingpoli.com/uploads/1/3/0/7/130775242/sabirus_wogalojez.pdfIn PDF document text
    • http://files.dyslexiaon.com/uploads/1/3/2/3/132303382/2670381.pdfIn PDF document text
    • http://kolili.speedcontainerline.com/uploads/1/3/1/8/131856979/80fda16769.pdfIn PDF document text
    • https://site-1036671.mozfiles.com/files/1036671/farisezizi.pdfIn PDF document text
    • https://site-1043495.mozfiles.com/files/1043495/30452378563.pdfIn PDF document text
    • https://site-1043691.mozfiles.com/files/1043691/jikifesidinu.pdfIn PDF document text
    • https://site-1038575.mozfiles.com/files/1038575/xasisizojoxoda.pdfIn PDF document text
    • https://site-1036880.mozfiles.com/files/1036880/levexutalobamelumena.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/d4da5f1f-72e8-4031-98fc-43d6038deb4b/62106774922.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/793e38c9-6763-4de9-832f-3382dce828f4/boroselop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7c237f2-dc4a-40b4-82e8-0c3898488946/21966402305.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_off00006767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6767 5392 bytes
SHA-256: a512878f320e8a1e61793ceaa221db43a3078a9e9d583d2806d07a871785c78c
font_01_sfnt_off000079c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79C5 10736 bytes
SHA-256: 441b9d188190e24d62bb465fdef70eecbbc920e2fc630edd808f39a69d29ac29