Malicious PDF — malware analysis report

Static analysis result for SHA-256 84298b62da8248a7…

MALICIOUS

PDF

41.1 KB Created: 2020-11-05 17:22:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-02
MD5: 2606aa5a5c1a8473e3a239dcff1c7191 SHA-1: 777537d7a09e0626d665803f079d75c27c124489 SHA-256: 84298b62da8248a71dcefd3872ada5786423f21b2e3ccf183f80b7751951e604
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://traffset.ru/aws?keyword=crossfire+series+pdf PDF link annotation
    • https://sofakixejiz.weebly.com/uploads/1/3/4/2/134265497/8889061fa0aa.pdfIn PDF document text
    • https://lafozevu.weebly.com/uploads/1/3/4/3/134378288/fb63ee86.pdfIn PDF document text
    • https://jopalezaleloloj.weebly.com/uploads/1/3/1/3/131380469/6345263.pdfIn PDF document text
    • https://zibefaxad.weebly.com/uploads/1/3/4/5/134594794/1237114.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005e6b.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005e6b.bin)
    • https://uploads.strikinglycdn.com/files/8675e811-6d4a-4a28-beb1-4926847142c4/41414228273.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/ginojiwukebuj.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/klasifikasi_angiospermae.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/senagegubuvajujafi.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/snohomish_county_courthouse_hours.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/niguxasexejaselokoda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cee885f6-827e-451a-b7f2-66cf3d770742/rutas_de_transporte_publico_tijuana.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 extracted file (font_00_sfnt_off00005e6b.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E6B 4700 bytes
SHA-256: 54c939911b95db765382112a881160aacf4e73fadd8f70cf387b526ffb28d2b5
font_01_sfnt_off00006e72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E72 15036 bytes
SHA-256: 0c50cf699a014674f7c23dd253c792754b7fa30f53b7e7fada35226223e70e39