Malicious PDF — malware analysis report

Static analysis result for SHA-256 71882d9c51bc895f…

MALICIOUS

PDF

63.3 KB Created: 2020-10-15 10:49:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: f021ba3a1c6db12a2ccce959ae08844d SHA-1: 7ccb35ce97ff826ea1896367eacddae3a9ba7454 SHA-256: 71882d9c51bc895f6a098a6813d501cbe77c9241f01b3d8afcb74bfaa2033ce4
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://gettraff.ru/123?keyword=calendar+2020+week+wise+pdf In PDF document text
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/wetoviwebotuzo.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/kedoxezezaj-temolej-zunemalavorun-mutelokowomimi.pdfIn PDF document text
    • https://zulatikuwa.weebly.com/uploads/1/3/0/7/130776211/razisepijelus.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/3257372.pdfIn PDF document text
    • https://punadojum.weebly.com/uploads/1/3/2/6/132680976/gomeliko.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/fibaxizimudez.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/a7b88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5f87be0ad5112.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f874b1b5a67b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f86f6488b22c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368975/normal_5f87fc93055e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5f870c87ed4fc.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/filosom-lusiwikafese-jerupuxorukoti-novubolifunuw.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/9743488.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/lefuneni.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/likanutavorolebonat.pdfIn PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/3253553.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f86f715a2c7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367617/normal_5f8765ee94c7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368782/normal_5f8782ab90e5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f87e48ed22a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5f874698b67cb.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/6c687254-58d9-4205-8ee2-6c04ae6480ff/65898752677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fb0d67f-cacf-4ed7-a868-2f1e1d5b2e5b/suvodabube.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_off0000b887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB887 5372 bytes
SHA-256: 96e514d866b675d91e88c98032c1cd37633ab00384c9c372170bbc8019375ef0
font_01_sfnt_off0000caeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAEB 10832 bytes
SHA-256: 315fce327dada543775397a351f5a018b17693a9c57d27929b828fcb6888a45e