Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3a26ad37aaac149…

MALICIOUS

PDF

37.5 KB Created: 2020-10-15 00:02:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ab95faac55b556c107196b3617ed6e8d SHA-1: 91d2a6bc3d65ee5b527ff448f8659626b3819062 SHA-256: e3a26ad37aaac14944689fe9514a939933c43b64a9f310174789fe208dc5b94b
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://cctraff.ru/pify?keyword=sentence+types+worksheet+7th+grade In PDF document text
    • https://zuwumepegowivos.weebly.com/uploads/1/3/1/0/131069935/360332.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/449102.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/b97e7.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/038885c85ecf8f0.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/jewilometok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366340/normal_5f870db5a93cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f8766d6a8abd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f8720e86d2ee.pdfIn PDF document text
    • https://besavikeneg.weebly.com/uploads/1/3/2/8/132815808/nidoxovopi.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/80bbf7e4.pdfIn PDF document text
    • https://sevanilab.weebly.com/uploads/1/3/1/4/131437268/rekanifaxojulil_malinifopene.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5f87278436cb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366010/normal_5f874e8b1a94d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367665/normal_5f87671c7d42b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366364/normal_5f8753da0e986.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4432/8856/files/romeo_and_juliet_setting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/ffxiv_ifrit_extreme_unlock.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_off000053fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53FA 5744 bytes
SHA-256: 5ea5eb79cc2fb44d31bad44e48af99598f79376e5ce8c944293f90a4841a2b4e
font_01_sfnt_off0000679e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x679E 9824 bytes
SHA-256: 29dd79f32fc908eb4c8c42fde30510672ccff30e7f60e3efbd3f6264cebc6ad0

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