Malicious PDF — malware analysis report

Static analysis result for SHA-256 31077849e5e2ba76…

MALICIOUS

PDF

42.8 KB Created: 2020-10-15 23:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6c43c158935d48956b63852ac0ca0688 SHA-1: 617feaa312e68e27872a5b7114c17a132bcf17d6 SHA-256: 31077849e5e2ba7604f862a9daa77857f7a709c0d99672cf6d1cec27475e3a2d
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/strik?keyword=wahiduddin+khan+quran+translation+pdf In PDF document text
    • https://tunimesepet.weebly.com/uploads/1/3/1/4/131455680/1867610.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/vaxukekiwurefebe.pdfIn PDF document text
    • https://pudukodup.weebly.com/uploads/1/3/1/4/131407572/833ce0e08a3.pdfIn PDF document text
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/12c9d87be66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f873d2e3a6a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f86f55e02229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365627/normal_5f8735ffcfbb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f8811984c989.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5f875af65de53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368466/normal_5f8842fd5d877.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366040/normal_5f87198db5ef7.pdfIn PDF document text
    • https://site-1038811.mozfiles.com/files/1038811/xuputilat.pdfIn PDF document text
    • https://site-1039163.mozfiles.com/files/1039163/96599764119.pdfIn PDF document text
    • https://site-1043434.mozfiles.com/files/1043434/70675116603.pdfIn PDF document text
    • https://site-1043600.mozfiles.com/files/1043600/ludiruw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/8521/2064/files/runoff_coefficient_values.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4324/4200/files/automotive_technology_a_systems_approach_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/1986/2694/files/89777487367.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4717/2269/files/bedovepozevumi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/3534/9151/files/nojove.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/9819/9995/files/journal_of_environmental_protection_and_ecology_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1093/0880/files/muvunabuxubuzax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6150/1848/files/58723533251.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3556/4949/files/gagemexiwut.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_off0000675a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x675A 5332 bytes
SHA-256: d306c980f643019c15b50d4328467a3dc6b4f0a2f02617d95e6be0d189839525
font_01_sfnt_off0000797a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x797A 10644 bytes
SHA-256: fd8e3d7cc021a5fb6f444307ffaeca94676257bb9c8681501a953e0b63bffd86

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