Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0e9fa02bff466d6…

MALICIOUS

PDF

43.7 KB Created: 2020-11-06 02:30:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 0179824baae94870e4b3adcacd32b06c SHA-1: 1729076436d39dbf18d3c8b4698c2e276b366173 SHA-256: a0e9fa02bff466d6bbdc183835cd0efd609a6d8e540fc9a742f39717597fad05
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=rimworld+night+owl+schedule PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377924/normal_5f8f883ab1b0d.pdfIn PDF document text
    • https://titenukom.weebly.com/uploads/1/3/4/5/134523185/d3847a8cc1cb5a.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/8190243.pdfIn PDF document text
    • https://telexetobowu.weebly.com/uploads/1/3/4/3/134339901/947988.pdfIn PDF document text
    • https://jipidonano.weebly.com/uploads/1/3/4/3/134340070/kalipogen-tamaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421062/normal_5f969ffda29ea.pdfIn PDF document text
    • https://pinonomobeberex.weebly.com/uploads/1/3/4/3/134318871/vuzezodar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/18cb0922-dea9-4fbf-b40d-f14a49c36e73/zikipoxiwajeniz.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/ge_refrigerator_age_by_serial_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77d78942-2f79-4007-9589-416ab7a62102/dazurib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e64e8a1-d386-4ac5-882b-956405fa7eff/xaxubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/514c39f9-0fa6-4d98-8b4c-11c5b12ba622/58665919121.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c1ecb3b-cbe8-4ceb-bc50-37c551fe838f/84334607701.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/298d5472-37d1-4e60-95f0-976dab911c66/mariachi_violin_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c93835ac-8d85-4dcd-abd8-7a4c0d975db4/50569076279.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f05563b-2b26-4496-95d7-bb8d0f959de8/nizagebezanopofaji.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_off00006a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A32 5240 bytes
SHA-256: f2752988b521354a78c19c6ea7f046740d0434a65361e4077946af421d945c92
font_01_sfnt_off00007bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF0 11232 bytes
SHA-256: 44db0d02072c16d1d98e3c16146af7c4b6582f1fed14c4c9e54cca05c754b85c

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