Malicious PDF — malware analysis report

Static analysis result for SHA-256 63cdb4dc7b413e3e…

MALICIOUS

PDF

40.3 KB Created: 2020-09-30 22:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a1fd09be29a7f48732188ceec2bb7233 SHA-1: f3fa9dee2ff75fc4305acde084547468e01a61f9 SHA-256: 63cdb4dc7b413e3e1a622c3000542d31abfac6edbab923f31236ba87caf1a2cc
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=abstract+art+techniques+pdf In PDF document text
    • https://site-1036957.mozfiles.com/files/1036957/59622204551.pdfIn PDF document text
    • https://site-1036855.mozfiles.com/files/1036855/78561374668.pdfIn PDF document text
    • https://site-1036956.mozfiles.com/files/1036956/70584634155.pdfIn PDF document text
    • https://site-1036960.mozfiles.com/files/1036960/11004467308.pdfIn PDF document text
    • https://site-1036935.mozfiles.com/files/1036935/lebit.pdfIn PDF document text
    • https://site-1036651.mozfiles.com/files/1036651/fosujijuzeligexureduwe.pdfIn PDF document text
    • https://site-1036629.mozfiles.com/files/1036629/67368804093.pdfIn PDF document text
    • http://files.signaturescoffeelounge.com/uploads/1/3/0/8/130814040/vejug-gupesaroruju-naxusid-dadiwimi.pdfIn PDF document text
    • http://files.schummwords.com/uploads/1/3/0/7/130740607/9257669.pdfIn PDF document text
    • http://files.direction4lifework.com/uploads/1/3/0/8/130813876/9a4a79969.pdfIn PDF document text
    • http://files.uofscdsp.com/uploads/1/3/1/3/131383954/1e0b0c2781.pdfIn PDF document text
    • https://site-1036781.mozfiles.com/files/1036781/tuvegigidegiluselosawifew.pdfIn PDF document text
    • https://site-1036731.mozfiles.com/files/1036731/fewaju.pdfIn PDF document text
    • https://site-1037245.mozfiles.com/files/1037245/zuzab.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_off00005ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED4 5468 bytes
SHA-256: f6900ea136d5906a517ea2724083b8a4f3e7c8214ca3981896a39919923dbda7
font_01_sfnt_off00007159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7159 10376 bytes
SHA-256: b8b179554b416fc7be6aa0a6321e3f5ff6a3db921cc1ad6745479cecef95c11b

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