Malicious PDF — malware analysis report

Static analysis result for SHA-256 573c631c1d6a308a…

MALICIOUS

PDF

50.3 KB Created: 2020-06-08 16:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-19
MD5: f7744d447f866df2f34e14a0416a259d SHA-1: fd8366158fe6f753a439e129a5fd184fa5d4f51c SHA-256: 573c631c1d6a308ae87dc2b5e655a513db1bbff8d47a83c1f97bc18a3e93b2aa
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://ttraff.ru/wp3?keyword=bizhub+c352+pdf#bizhub+c352+pdf In PDF document text
    • http://colormezen.com/uploads/1/3/0/8/130813649/446e5f57.pdfIn PDF document text
    • http://customtshirts-more.com/uploads/1/3/1/8/131856205/gopudinizatotexola.pdfIn PDF document text
    • http://intensifyyoursport.com/uploads/1/3/0/5/130540118/008f8c05c5a.pdfIn PDF document text
    • http://nightheronpublishing.org/uploads/1/3/0/3/130313466/sikepalebiwodezuz.pdfIn PDF document text
    • http://manifestllc.net/uploads/1/3/0/6/130603895/ziwofewomo-zuridulusapovak-gujuzadukesete-neragarenekexe.pdfIn PDF document text
    • http://premierpersuasion.com/uploads/1/3/1/4/131408117/1753627.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://movovosu418811970.files.wordpress.com/2020/06/36705033103.pdfIn PDF document text
    • https://lulazuminer.files.wordpress.com/2020/06/26440308968.pdfIn PDF document text
    • https://waxirowom.files.wordpress.com/2020/06/butuxibejatunisevog.pdfIn PDF document text
    • https://susuloteteze.files.wordpress.com/2020/06/timulevijirax.pdfIn PDF document text
    • https://xawufejuzo.files.wordpress.com/2020/06/tatonow.pdfIn PDF document text
    • https://wavujilep.files.wordpress.com/2020/06/16597246208.pdfIn PDF document text
    • https://lixogobofa.files.wordpress.com/2020/06/dobavekokuxixarimibidag.pdfIn PDF document text
    • https://rewabukuda.files.wordpress.com/2020/06/19307325772.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9687 11588 bytes
SHA-256: 93eb7f98f534a07e40ba0b681948818b594da963e7c9f94a40fb7c1e40e64d22