Malicious PDF — malware analysis report

Static analysis result for SHA-256 73b774a55ebb11ad…

MALICIOUS

PDF

46.7 KB Created: 2020-11-07 08:31:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: c280b0bddddbc9078ee95da1af60db82 SHA-1: 84aa7e4e76bdf402c52c1336ce4a603ff59208bb SHA-256: 73b774a55ebb11ad34dfc28f301fce2110204143e6a79d1316debf19f2678420
126 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.
  • 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.
  • 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://traffset.ru/aws?keyword=executive+summary+example+for+a+restaurant PDF link annotation
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/dawam_dalexiveba_xasatujivawo_warefozi.pdfIn PDF document text
    • https://dawanuma.weebly.com/uploads/1/3/4/3/134305997/169382.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372707/normal_5f95333daee57.pdfIn PDF document text
    • https://xajoxivanuxus.weebly.com/uploads/1/3/4/4/134432241/876bc44bfcb6ba9.pdfIn PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/bowigisutogufawolin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fufepekizuxo.files.wordpress.com/2020/11/pelapibujebefogobilexano.pdfIn PDF document text
    • https://gefavene.files.wordpress.com/2020/11/new_castle_delaware_police_dept.pdfIn PDF document text
    • https://lulofega.files.wordpress.com/2020/11/1899113559.pdfIn PDF document text
    • https://rezumisoju.files.wordpress.com/2020/11/5297228756.pdfIn PDF document text
    • https://xeruluzolu.files.wordpress.com/2020/11/31522472749.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/79604469742.pdfIn PDF document text
    • https://botebofeji.files.wordpress.com/2020/11/15963812645.pdfIn PDF document text
    • https://sebuwisawos.files.wordpress.com/2020/11/fipupojuretis.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_off000073ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73EF 5348 bytes
SHA-256: 4300ced93a447596874c10d42ca847b78cbb981e3bacfb33f4af17ac1d00542c
font_01_sfnt_off0000861f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x861F 11668 bytes
SHA-256: 110f3da8cebc71103b9cad8c7b10837ee2dab01c2a45639b22314d49f1827264

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