Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9d6aa3f3f1c730a…

MALICIOUS

PDF

63.0 KB Created: 2020-10-28 21:24:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: edd75facad08005280afa65fc150cdd4 SHA-1: 40ba419a710c4fa4509c19cd34ad5af4ed0cdc2f SHA-256: c9d6aa3f3f1c730a9c36f9fe572fe7efb36af374213b61950c867f387f38f747
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=police+brutality+persuasive+speech+outline In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378382/normal_5f8f5cff152e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369512/normal_5f8817d40537f.pdfIn PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/totenowawuni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381964/normal_5f94a9d130605.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367019/normal_5f959023c27e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367642/normal_5f87a65da787d.pdfIn PDF document text
    • https://gobisenuginofaz.weebly.com/uploads/1/3/4/4/134490447/nokevani.pdfIn PDF document text
    • https://fadusoga.weebly.com/uploads/1/3/0/7/130739873/2c15d131a8605.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369512/normal_5f8f596aeb75b.pdfIn PDF document text
    • https://mufebukevep.weebly.com/uploads/1/3/4/0/134096334/nerajupukekufiler.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422373/normal_5f99ac044b142.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/zedogesaviw.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000b704.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000b704.bin)
    • https://s3.amazonaws.com/felasorarabipis/gifesegeg.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/hs_code_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/kaxenudime.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/jifur.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/73585260411.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/computer_programming_books_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/15851489458.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/4668373984.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/91673400368.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/agency_costs_ownership_structure_and_corporate_governance_mechanisms.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_off0000b704.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB704 5324 bytes
SHA-256: 3eca9342058d2cc74911ed2f35e6d8daa5db77a894539b072e5f46beb4d50db7
font_01_sfnt_off0000c923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC923 11080 bytes
SHA-256: 8d77cc5830542739138317d37a190ae5107fae0056566471095b1bfd822e1ce8