Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f60c5e277c846cd…

MALICIOUS

PDF

46.1 KB Created: 2020-11-07 14:06:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: b5c7d06996ad4db5cda1b340cbff9302 SHA-1: 087550ff6b9181db72b4a8f2dfabb2a42fa3dd48 SHA-256: 3f60c5e277c846cd2da132415915836460ac224a067eba243a969d86c48894c0
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://trafficel.ru/123?keyword=problem+and+solution+videos+for+kids PDF link annotation
    • https://sowameneritela.weebly.com/uploads/1/3/0/7/130775755/c04eefb9.pdfIn PDF document text
    • https://katolafafesol.weebly.com/uploads/1/3/4/4/134479470/kedagokuvebomo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f870016362a3.pdfIn PDF document text
    • https://lulitetuxopibol.weebly.com/uploads/1/3/1/1/131164377/4ee702c8c8.pdfIn PDF document text
    • https://fobuxowomi.weebly.com/uploads/1/3/4/2/134235628/dadedebavuj_xumorinodemenoz_pezawikeroju_sekowolizulowe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407988/normal_5f94cdba95406.pdfIn PDF document text
    • https://dizakevusarebiz.weebly.com/uploads/1/3/4/5/134581037/vaxiwiro-webevir-zajovawexoxuxa.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/rimejiguvif/jaxegewalaj.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/85271623582.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/vukogasijijajesavo.pdfIn PDF document text
    • https://s3.amazonaws.com/tipakalif/3136139768.pdfIn PDF document text
    • https://zuzoxet.files.wordpress.com/2020/11/lowokotanibutelol.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/lorazepam_davis_drug_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/81861543622.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/aapc_cpc_exam_questions_and_answers.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_off0000757a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x757A 5320 bytes
SHA-256: 6d4b00f5da6686b5746d35904a3081764a535a4d8d0aa89c18c5a372784be9a4
font_01_sfnt_off00008779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8779 10596 bytes
SHA-256: 5ce7bac690f390b89249367a157afeda2f4436e82cf8c6f3cdbbb55c1a6a4589