Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb6080267c79494c…

MALICIOUS

PDF

40.5 KB Created: 2020-10-09 22:29:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 69dbb8ec9425658c6219937e244b7794 SHA-1: 810cfe207ee2b076079aa6233697024742c75b39 SHA-256: cb6080267c79494c98006372716d056c1113506580d1429f6a3c9293ae57ecb7
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=ragnarok+clicker+tips+and+tricks In PDF document text
    • http://files.theaffairseries.com/uploads/1/3/1/4/131411281/pilaximuxipa-ladoziveludu.pdfIn PDF document text
    • https://site-1036637.mozfiles.com/files/1036637/jabokofomesasom.pdfIn PDF document text
    • https://site-1036955.mozfiles.com/files/1036955/67857665567.pdfIn PDF document text
    • https://site-1036807.mozfiles.com/files/1036807/34481703687.pdfIn PDF document text
    • https://site-1038762.mozfiles.com/files/1038762/mufidutovekidokituxa.pdfIn PDF document text
    • https://site-1036661.mozfiles.com/files/1036661/85933090252.pdfIn PDF document text
    • https://site-1036678.mozfiles.com/files/1036678/duxepe.pdfIn PDF document text
    • https://site-1038789.mozfiles.com/files/1038789/xugifo.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/7e9bba89-6044-4cac-90ed-313b364dd3d5/bojuwalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acb796b0-f77a-4259-bd3d-7a1d3b26edff/6664277292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eb256ec-8443-4b1c-bdfa-80df80deb9d1/34400261203.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75e93423-7d27-4e22-be21-5f18c9a24536/lojusunokokadejamaki.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_off00005fea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEA 5312 bytes
SHA-256: c7c3b486df37c828b09c9449cbadba9f5820749f5797ec55477f19c9e4da72d4
font_01_sfnt_off00007211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7211 10412 bytes
SHA-256: 7fb66821ee8b2756896f0299c20062f2f890b000321668425faba3c39c99a155

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