Malicious PDF — malware analysis report

Static analysis result for SHA-256 1292998dcabb7dbc…

MALICIOUS

PDF

35.2 KB Created: 2020-10-30 12:09:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: d41ff0b9743a48d9a1b68b77633d4f0a SHA-1: a05708396b4c6ccbe292528ef1a7469a81256635 SHA-256: 1292998dcabb7dbce82fa4188ea2cbf9113fd2c11f11b85aaf60f877ac734643
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/aws?keyword=cookie+lee+jewelry+bracelets In PDF document text
    • https://dekekutema.weebly.com/uploads/1/3/4/4/134440935/kovevi_misuliriwu_sesoradeba_kofixixere.pdfIn PDF document text
    • https://zavomori.weebly.com/uploads/1/3/4/3/134335150/9110150d2f9bc4.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00004b68.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00004b68.bin)
    • https://s3.amazonaws.com/gafedupeba/society_by_laws.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6738/3712/files/a_promise_of_fire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4716/4336/files/bagafobi.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/wabilopufotejido.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/61764586810.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/shunt_reactor_transformer.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/93836685726.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/satanas_mario_mendoza.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/73001563991.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/bevel_gears_design.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/inductive_and_deductive_methods_in_economics.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/puwojagapavudokosabituf.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/little_bird_tales.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/44620357987.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_off00004b68.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B68 5172 bytes
SHA-256: 86aade8d9be9d7ae8a72fb29f22d81be881d141bb556abfd51e2dcb8c454f63d
font_01_sfnt_off00005d24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D24 10160 bytes
SHA-256: 444f58ed507714678bb2914220b86dd44c8d62be6195f858d40ed1ea052b4730