Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c700809b51a4dee…

MALICIOUS

PDF

67.3 KB Created: 2020-11-11 02:02:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 64b4d96fa0daee02c9174a72ead69425 SHA-1: b548f7aef27e8229969f8feedf8f3a6cc1096228 SHA-256: 5c700809b51a4deec87d28897a18162e19305f5580ab4ba84ad442c2e0ce8c3b
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?keyword=the+seventh+most+important+thing+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370064/normal_5f8fb0e90d7fc.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/9229621.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367303/normal_5f891f5c505c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f870c2d5e9e6.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/belapigojat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373248/normal_5f91c8a59a0c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_5f8f3a10ae9ca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/776e08bf-4a66-4744-ad7e-1264618a211e/78705934128.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55309315-fcf0-47ee-b814-028f89b164b3/towufogukulijefivaki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbfb8531-7897-454c-bb58-b0061f84a029/58262142684.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bbb3f88-9379-4b9d-b722-c4a90036d829/60365134893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36e2fc72-f853-4066-9c95-1a727dcb7e9e/28944484569.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_off0000c9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9EE 5432 bytes
SHA-256: f23c034b2a7c90098d0228f766a2dc948442d94a2bd43402d6ed671e5e7e4293
font_01_sfnt_off0000dc42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC42 10656 bytes
SHA-256: 12336e92279c17b0096a13f394f9ed52e7976872da0f4243b1ddbbf4e11db1ba