Malicious PDF — malware analysis report

Static analysis result for SHA-256 dca6327e5976e217…

MALICIOUS

PDF

40.6 KB Created: 2020-11-03 16:14:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9b8c7bcb7ea959163ab57bcec5456c4e SHA-1: 1e92f588d2a8b26590546dec63a03a0618af4361 SHA-256: dca6327e5976e2173735cf6d02b2fdfa3ab97288302071db7090d2a73f515622
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://ggtraff.ru/aws?keyword=nv+200+conversions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4451206/normal_5fa1165e2c4d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417815/normal_5f964a2a2f0df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366302/normal_5f9554c9f00aa.pdfIn PDF document text
    • https://zefufewik.weebly.com/uploads/1/3/4/3/134374544/xonumomipuzakaruzage.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f9d95f0bd126.pdfIn PDF document text
    • https://dalowosa.weebly.com/uploads/1/3/4/3/134383453/posuma.pdfIn PDF document text
    • https://fobewesepujub.weebly.com/uploads/1/3/2/3/132303403/rewajabegigosumu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386829/normal_5f8e229c97172.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f8925ddc2b65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390664/normal_5f9208f01ef03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383449/normal_5f9baf975d30d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366655/normal_5f88ba8430c2b.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/lorifumofelu/13054319469.pdfIn PDF document text
    • https://s3.amazonaws.com/kamigovitakiril/online_christian_science_service.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_off00006148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6148 4856 bytes
SHA-256: 2f40013e0460912df3ba5fcb79880971f2e0f98db81266955c015ebc8334990d
font_01_sfnt_off000071ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71EA 10660 bytes
SHA-256: 4c22ef4dc9a1eaf5abb31fbda6735fb01011079535b89d187ea4e8fe2e3c9317