Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c817a63f6ef0ab8…

MALICIOUS

PDF

42.4 KB Created: 2020-10-29 13:12:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 61847886d2e0f12ec64fa6828fe5e483 SHA-1: 48552bebb91d14a10136d9876d7446cb5a6a389e SHA-256: 6c817a63f6ef0ab8ba4fdc9ba187b1d524682db9bc35893eeed4dfabe39126aa
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=cda+agent+monsters+inc+kh3 In PDF document text
    • https://belujewirozem.weebly.com/uploads/1/3/2/6/132681559/2b1401c9c1d363.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/bea5c020afe7.pdfIn PDF document text
    • https://juwimifabofif.weebly.com/uploads/1/3/4/3/134369341/nufav-xuwegibefut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373992/normal_5f8f8d8bd3cac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388412/normal_5f8eba3b10c9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377909/normal_5f93333968eba.pdfIn PDF document text
    • https://zisokilusativ.weebly.com/uploads/1/3/2/3/132303079/6870353.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000064ff.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000064ff.bin)
    • https://uploads.strikinglycdn.com/files/92eec54e-a75b-4f1f-9b07-8f6f8d3a38fc/metro_exodus_caspian_good_ending.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/botulismo_en_perros.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/30825144901.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/cora_jakes_coleman_wiki.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/2601971008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/931ab9d8-b4cc-4bec-a5c5-684f7e2d227c/charms_office_assistant_data_breach.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/uefa_champions_league_2019-_20_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/xuzowikumozesitegi.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/binary_isomorphous_alloy_system.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/external_causes_of_poverty_in_tanzania.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/fish_biryani_recipe_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6143df8d-029f-4fad-aaf5-f350f0d705f6/62989404434.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/pasetafizakevebopojitet.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_off000064ff.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64FF 5452 bytes
SHA-256: 2ab1bc86ab9103b33e2b94bd775641954b417872a121ab14dbcbff26fb296877
font_01_sfnt_off00007763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7763 11000 bytes
SHA-256: f5f051e17acae3847ae93a4f01be5afe3469181ce58af06b5d10c230beb1a82d