Malicious PDF — malware analysis report

Static analysis result for SHA-256 5948a0d31ffac957…

MALICIOUS

PDF

36.5 KB Created: 2020-11-06 02:48:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 941b59037b04c1dd730290577423163a SHA-1: c87095dcb3215e1bee3b39fc41da23ffc2eaeb55 SHA-256: 5948a0d31ffac9574c80ebfe0e90eb4b78451405c4dfc5bbeb32a235d6ad42c3
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?keyword=hobbs+and+shaw+drive+mp3 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379723/normal_5f939d0f76c74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453730/normal_5fa3ad7410ce8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418000/normal_5f9fb61edf7a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5f88562534241.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389830/normal_5f922d7c423cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372072/normal_5f8deb9a1a656.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408992/normal_5f9efcf53ed7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411683/normal_5f9fc9ece73ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383451/normal_5f8d0a8b188c5.pdfIn PDF document text
    • https://janazasifopuno.weebly.com/uploads/1/3/4/4/134437996/vopupaxapi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379613/normal_5f8d90eef0679.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379982/normal_5f8cb95c26f79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379222/normal_5f8b2d7977efe.pdfIn PDF document text
    • https://bipikive.weebly.com/uploads/1/3/4/3/134342269/e9a5783e7a4b9d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/mulovogakewenafopaxobogo.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/antenna_types.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_off00004e3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E3E 5584 bytes
SHA-256: ee005727f32ef0b9d3a2db96ea61f090eac82796a0fed6b8c24c293342e4b546
font_01_sfnt_off0000611e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611E 10256 bytes
SHA-256: 1e7ed9022b9386ce2c0b0724f630711700b9111d9e1e50d9d445f46c862571d7