Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd3f712e1fe8713f…

MALICIOUS

PDF

35.8 KB Created: 2020-11-09 11:15:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 193bf702a38b8bc68d5293e55deee719 SHA-1: e0e5cf88cb4cd0f0ca9447becb3625c5724d3312 SHA-256: dd3f712e1fe8713f5fb29469fb6f42ea4397fd7e349feb28f7b327c0732c1912
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?keyword=asco+2020+meeting+program PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380073/normal_5f98f6bc15bbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382974/normal_5f9ddf4255efe.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/nexofobe_dukan_nonozaguref_jubegesasipofaj.pdfIn PDF document text
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/kofukuxiwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378620/normal_5fa27faf7b7b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373749/normal_5f8b116032daf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426557/normal_5f9b5710c1519.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367920/normal_5f8a4f05e3127.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/gofiguj/75933002125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/626ccd06-aee5-47c5-9875-0d751484de90/jenupibexan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/681500ef-7822-4361-8f0d-4b9cb986ef1e/28517986082.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f3b5c53-a251-4d00-82da-88410b683de6/15628526861.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_off00004ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CA9 5484 bytes
SHA-256: d8164044bc64929016af9bd54ea9e7ca025743b11af6cc2a1c734efe8b4f80f5
font_01_sfnt_off00005f3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3D 10360 bytes
SHA-256: 9f6bb99722e317af501a117c3c19f700bb4b03ce1203227965f5a5e28bf81e39