Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b9767e0f68e968d…

MALICIOUS

PDF

44.9 KB Created: 2020-10-16 20:18:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3a89aaaeaf7d4d8ae9b289dc3dcd5b9c SHA-1: a4601c5dfef8c836f378ff7cf9dc3c71aef43f1a SHA-256: 5b9767e0f68e968d89a094a54d73aa528110c9bb983603fcb6c67b1966195d02
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://gettraff.ru/123?keyword=fine+woodworking+best+workbenches+pdf In PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/bamudepekepa_setumazowido.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/tugunari_fogeze_nezejavoz.pdfIn PDF document text
    • https://jixepelisu.weebly.com/uploads/1/3/2/6/132695865/negisarulizix-pufavokojafa-jaxinan-vusav.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/runemevurexuziwone.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/kopiwu_gotatumeturi_bovejixegas_vivikow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368984/normal_5f88775259913.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f877b6d39adb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366973/normal_5f872e75f3720.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/sutusozupixapu.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/devuxupujikeninaferi.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/gapovowumepekegosiza.pdfIn PDF document text
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/punadax-kazugokov.pdfIn PDF document text
    • https://vawotitalu.weebly.com/uploads/1/3/2/7/132710714/c9686fff3a9e.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/1/0437/1123/4199/files/rectangulo_en_ingles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1030/9787/files/1975665008.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/0432/3734/files/nofikixesiju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3768/2585/files/sepubegapediko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/8054/7997/files/anime_fighting_simulator_script_vermillion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4698/4616/files/20760299123.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5208/6934/files/white_pages_pahoa_hawaii.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8865/0146/files/86583647912.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fee18c23-3177-434d-a1ad-6e8b21ea3a13/87677930630.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fec3275-e591-4cf7-8bff-aada7d13a95f/35735193793.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8f91b1e-5e27-4167-ba4d-495d62562c32/fomimuti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47fc6379-1a20-4cdf-9e45-d68f77ac511f/wejizomaxaperetuzin.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_off00006f1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1C 5424 bytes
SHA-256: c5681275b09cc39cfb0df8e5fc87905b8677ace430c744e0f4e9e9b73c573208
font_01_sfnt_off000081a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81A4 10652 bytes
SHA-256: 7d3090f39ab7ce763b01851379b9b9d4f5e3efd513f844caf6acd53330d062cd