Malicious PDF — malware analysis report

Static analysis result for SHA-256 be4dc46468948c4b…

MALICIOUS

PDF

50.6 KB Created: 2020-11-08 12:19:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 602459f83c2ac4f1cd605cea4e6fd9b9 SHA-1: a641cfaeb8001e5dc78ba156ff1a75f2095adec2 SHA-256: be4dc46468948c4bcf9397804849d3ab6a795cf08940033ca6b0f4aa9d6921dc
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://trafffe.ru/123?keyword=universal+remote+apk PDF link annotation
    • https://dojudiwoju.weebly.com/uploads/1/3/1/4/131406456/xujabalo.pdfIn PDF document text
    • https://moxetutatag.weebly.com/uploads/1/3/4/2/134234950/7632704.pdfIn PDF document text
    • https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/samupekawi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370278/normal_5f9238efcfac6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453556/normal_5fa2098c002ce.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/1e946381-aa54-49f0-a10f-4d04c6c5fdaf/nmda.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/ccna_cyber_ops_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/blood_type_ab_diet.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/house_karstark_sigil.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/depression_scale_test.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/91079294184.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/20455198305.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/benawexuxulegufapojob.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/51548270901.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/church_of_nigeria_anglican_communion_liturgy.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/aparato_de_golgi.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_off000086b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86B3 5080 bytes
SHA-256: 10557b226d70a536f853cc9eeac1fe43d1fc43112f9e7000d5c5814c414ba8ff
font_01_sfnt_off000097f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97F3 10944 bytes
SHA-256: 04d4fb6c56df8133e0e5cb76b306d1e72082af33b8c349210070f0bb49b3c081