Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea5d3e712e3d0697…

MALICIOUS

PDF

51.1 KB Created: 2020-11-07 06:19:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: a64d11379dfa7d2635303d863721ee32 SHA-1: 4c453e0365528e86b9db8acbca623dedfd1c5996 SHA-256: ea5d3e712e3d0697ac5d27287fa31ee598df49fab49f09a2792a0335525cca20
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://traffking.ru/123?keyword=the+craft+of+research+pdf+3rd+edition In PDF document text
    • https://bedakowunuva.weebly.com/uploads/1/3/4/3/134342711/nunajuko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417207/normal_5fa5c79be0c73.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://nifesewuwa.files.wordpress.com/2020/11/medical_fitness_certificate_for_leave.pdfIn PDF document text
    • https://dusurujadexo.files.wordpress.com/2020/11/ecg_quick_reference_guide.pdfIn PDF document text
    • https://joxonep.files.wordpress.com/2020/11/22228810463.pdfIn PDF document text
    • https://mutozofe.files.wordpress.com/2020/11/65548376527.pdfIn PDF document text
    • https://podenujo.files.wordpress.com/2020/11/nemezulitebevu.pdfIn PDF document text
    • https://teviwuder.files.wordpress.com/2020/11/nowebikulifovizajifojuwu.pdfIn PDF document text
    • https://vuxogomirus.files.wordpress.com/2020/11/ejemplo_de_un_plan_de_exportacion.pdfIn PDF document text
    • https://xuxedoki.files.wordpress.com/2020/11/house_rental_agreement_format_in_kannada.pdfIn PDF document text
    • https://bepamikolif.files.wordpress.com/2020/11/tusuwekagosimixo.pdfIn PDF document text
    • https://wixisodek.files.wordpress.com/2020/11/rozemow.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_off0000882a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x882A 5324 bytes
SHA-256: 5441ee2eb0cc5b900961de9d037e16e6197f98f217e9866eca07e313f96b1d25
font_01_sfnt_off00009a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A40 11052 bytes
SHA-256: 9c8dc232044f17e7dfac82515d63fb1a356f1261fbf6a2f72a13660e9e5ab021