Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7e278e9c12380d7…

MALICIOUS

PDF

41.6 KB Created: 2020-10-02 20:30:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 76722a4f65221061e5b7e73d3a8cf46a SHA-1: c61d04f78e46d0f3da7bed674467533beaa3f441 SHA-256: a7e278e9c12380d7c0e7ffecd1d5271973a30af09c8207b9fe6e2c66c66736e2
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://ggtraff.ru/strik?keyword=effective+python+pdf In PDF document text
    • http://files.tilliesnevada.com/uploads/1/3/1/3/131379612/xapixivote-pipugu-neruxesivalu-wifuf.pdfIn PDF document text
    • http://migaxowus.screvenmotorsports.com/uploads/1/3/0/7/130739063/wejiv.pdfIn PDF document text
    • http://pozek.bosselitehockey.com/uploads/1/3/1/4/131438062/2320860.pdfIn PDF document text
    • http://dogozig.dancefirstllc.com/uploads/1/3/2/7/132712207/varememow.pdfIn PDF document text
    • http://vuxol.brookhollowwinery.com/uploads/1/3/1/3/131382700/nuvolizomomuwujedone.pdfIn PDF document text
    • https://site-1036733.mozfiles.com/files/1036733/91008751776.pdfIn PDF document text
    • https://site-1038699.mozfiles.com/files/1038699/fabefigejesefuxo.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/8c51762a-bbf4-4bdd-be21-bfd3e6ce6b6b/mifasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48c4ecc5-620e-4ab0-aced-db343acd7159/fekegelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0b7b031-4d92-4923-a60e-799293dd32b0/67969099119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6897f207-b6b3-4da9-b284-d79148245627/44437835630.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c1356a0-9187-40bd-9c6f-016f25d3edbc/44773178408.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_off00006651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6651 4844 bytes
SHA-256: 549f69846dd2bfa869872d930fecff890b9e9cf7adf4e3c2aeb912fd5d5bf8c0
font_01_sfnt_off000076e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76E9 10340 bytes
SHA-256: 3312c8f1035c711fb910d82a4058e917d75c507d48e6ab1dbd998ea4301db80c