Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f9b367289e559c…

MALICIOUS

PDF

47.3 KB Created: 2020-10-05 02:13:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4f15492b02f9086e57de0b9085ef06a2 SHA-1: fb3bd302b930aebdb53789b3d665f30973046b13 SHA-256: 76f9b367289e559c4497495a9ee3b5ece57968e1bbd70e68934d5bc0c236b93b
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://cctraff.ru/strik?keyword=burrito+bison+launcha+libre+wiki In PDF document text
    • http://xigopapus.foundationsfirst-ni.com/uploads/1/3/0/8/130814623/20375eae1.pdfIn PDF document text
    • http://files.yellowboatstudio.com/uploads/1/3/0/7/130776673/1172534.pdfIn PDF document text
    • http://files.jacquelinetopakian.com/uploads/1/3/0/7/130739814/8091273.pdfIn PDF document text
    • https://site-1038768.mozfiles.com/files/1038768/resezixad.pdfIn PDF document text
    • https://site-1038547.mozfiles.com/files/1038547/61005569800.pdfIn PDF document text
    • https://site-1036923.mozfiles.com/files/1036923/vekamuwukerezewi.pdfIn PDF document text
    • https://site-1037145.mozfiles.com/files/1037145/21116141692.pdfIn PDF document text
    • https://site-1037106.mozfiles.com/files/1037106/zapoxokovawabexumimepuxe.pdfIn PDF document text
    • https://site-1039671.mozfiles.com/files/1039671/72319433437.pdfIn PDF document text
    • https://site-1043438.mozfiles.com/files/1043438/98075925668.pdfIn PDF document text
    • https://site-1040248.mozfiles.com/files/1040248/livigabivuzaritunadusujo.pdfIn PDF document text
    • https://site-1036941.mozfiles.com/files/1036941/jadodaboxogita.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/920513ff-339f-4044-b7ed-7963879c00ab/43313762608.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_off00007a6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6F 5232 bytes
SHA-256: 7fab7acceb9de52c2beed22aa4950ced4616141c8575fab1819d5f49c4af48b1
font_01_sfnt_off00008c47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C47 10580 bytes
SHA-256: 45abd41d9d7a56d4e272b6ac485fb0e9b964149bc15c8fbe7c7a1352c9755aba