Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfe7381d815513ab…

MALICIOUS

PDF

34.2 KB Created: 2020-10-28 15:01:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: a74e58acf9e07e9385e0e07cb90902e3 SHA-1: c47a587a9ca0c87d82de1b04f942d71f65e0fd65 SHA-256: bfe7381d815513abe839616d29293c91e8b3f5432d6a85543caba4735390bc47
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://cctraff.ru/aws?keyword=constitutional+law+2+outline In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382772/normal_5f949195a9192.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368964/normal_5f8879b32f99d.pdfIn PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/58e2f.pdfIn PDF document text
    • https://xejibojap.weebly.com/uploads/1/3/4/3/134310503/wisutatezokujuwugomu.pdfIn PDF document text
    • https://jopalezaleloloj.weebly.com/uploads/1/3/1/3/131380469/fa6afa33d8166e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410714/normal_5f976b2e3c5c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369334/normal_5f91eb70955ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388815/normal_5f9187808674c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372972/normal_5f89c3f1c79f9.pdfIn PDF document text
    • https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/6312747.pdfIn PDF document text
    • https://rewemekekebaz.weebly.com/uploads/1/3/1/4/131406535/gakabonatowez.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00004b13.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00004b13.bin)
    • https://cdn.shopify.com/s/files/1/0437/7152/7319/files/how_to_divide_functions_in_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efd64cc6-11a9-4a8a-93db-e118607c64bd/73149673628.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/917cfb69-f99b-4e1b-b16a-5f86bdc49503/54435344785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cf391d3-972f-4ec4-a4d2-a95b7293c6b5/compound_area_problems_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/3068/4063/files/39045146661.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef3478b2-ba93-4155-9f82-32985c522d51/college_physics_volume_1_10th_editio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7047/9772/files/mandy_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e95e375c-7c17-4218-afc9-be92abae43a0/86800509929.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 extracted file (font_00_sfnt_off00004b13.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B13 4712 bytes
SHA-256: 3199c951868fb951cf22da0e9f3a94ddaf79bd91bee1ccacef3e9c6a40a39cd6
font_01_sfnt_off00005b39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B39 9616 bytes
SHA-256: 168217eec28b573742e11e79b1478221f1b3df4bb07e752f70d0c64beca29055

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