Malicious PDF — malware analysis report

Static analysis result for SHA-256 b459e220dab0b4c5…

MALICIOUS

PDF

44.4 KB Created: 2020-11-01 09:11:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: ef5b3c3da389fec36da666cd68567e3c SHA-1: e45ebf2a8c03e39f08e05d27bd1f4e2989a29b98 SHA-256: b459e220dab0b4c552fc9653d24ede9bd1876c83427ff956835080f6d9bda772
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/aws?keyword=kindergarten+killer+game+unblocked In PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/kexotiwov.pdfIn PDF document text
    • https://bilimetib.weebly.com/uploads/1/3/4/4/134435282/zupawenas.pdfIn PDF document text
    • https://lirutuve.weebly.com/uploads/1/3/4/4/134462413/6294880.pdfIn PDF document text
    • https://fevixivosetakub.weebly.com/uploads/1/3/2/6/132681861/wunoteb.pdfIn PDF document text
    • https://xivuseto.weebly.com/uploads/1/3/4/3/134316593/3839834.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006e61.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006e61.bin)
    • https://uploads.strikinglycdn.com/files/6b13ff36-e1dd-427c-9d3d-bd410b4fa585/46827517948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35f1e41b-fd3a-4fb3-93ef-1d3f63e317e1/4171592543.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/active_listening_skills_in_counselling.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/vigekifagegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3172a179-29ca-4ecb-980a-8f4ac8a8d27d/45512600037.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27a4fd1a-cb9c-4759-8935-bfaad7175df9/66777077295.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83c9a357-0ae0-449a-b498-d35a211ac37d/81828426926.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8140/9713/files/fanta_household_dietary_diversity_score_indicator_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6de93e6a-8adc-4d35-9c0b-810682cf1248/billie_eilish_lovely.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bf3787b-7188-448f-bd0f-b0a2e1d84d0b/rotmg_fame_train_server.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_off00006e61.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_off00006e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E61 5252 bytes
SHA-256: 31a8d7f919ea0128b55fa673b11b11f4ed266d4b56f407081091bd483746f4fb
font_01_sfnt_off0000802b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x802B 10748 bytes
SHA-256: fef80dcffdb61254c6fe787b63c784696caaeba3c254f208d7bb3d29ad45f296

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