Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e6fb063e76103a0…

MALICIOUS

PDF

62.3 KB Created: 2020-11-13 03:16:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 559f8d621976088fbda98ae51a8817bb SHA-1: bee028ef8a02147aec6f1c378b5d5c1ecb221734 SHA-256: 0e6fb063e76103a06beaf34347763d59ec53d6047d4c3e67d5a7f126b76e1a71
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm designed to manipulate search engine results or distribute malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports a malicious intent. No scripts were extracted, but the overall structure suggests a phishing or content distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffi.ru/strik?utm_term=fotos+antiguas+de+la+carriona+aviles PDF link annotation
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/ganepon-fadogi-nerere-dusij.pdfIn PDF document text
    • https://dedotomonifagax.weebly.com/uploads/1/3/1/6/131606429/fesorupexo.pdfIn PDF document text
    • https://wiwawuvagowe.weebly.com/uploads/1/3/4/4/134496439/milaxovilidefigevu.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/xusimob.pdfIn PDF document text
    • https://fifowekuvepu.weebly.com/uploads/1/3/0/7/130776735/4488114.pdfIn PDF document text
    • https://pigunakates.weebly.com/uploads/1/3/4/6/134628742/wokaruruvap.pdfIn PDF document text
    • https://dokakida.weebly.com/uploads/1/3/1/3/131380589/ae086bba.pdfIn PDF document text
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/pinexipozovumidavi.pdfIn PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/lidimona.pdfIn PDF document text
    • https://xutewosabog.weebly.com/uploads/1/3/2/3/132303209/zikakalopifa.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/tetazino/adding_subtracting_multiplying_decimals_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/51674204903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5826d8e8-7f0f-4a1e-89c1-2e4e5dcb9434/bututajazulefu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8730373a-6973-4044-b337-c3230abb9179/jepesizajumixomuf.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_off0000b68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB68D 5124 bytes
SHA-256: 33b5cdbcb6ae766f93ad94746fe733836093fa234452c577447bae5acc3738e0
font_01_sfnt_off0000c817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC817 10636 bytes
SHA-256: a24977afda0ff2c95fabfdb0f9954491adf41d61be0be12990e546b8842797e5

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