Malicious PDF — malware analysis report

Static analysis result for SHA-256 d67cfea4d82355c8…

MALICIOUS

PDF

46.2 KB Created: 2020-10-07 01:15:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 590e51f0e88475f1e37fa736f986de3d SHA-1: d47fe1870ecad9c4a04d813b1fa4cf33b437650b SHA-256: d67cfea4d82355c8983837a2e07da8d63963062f17a6154d646daac0c4e25c5f
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/pify?keyword=boy+scout+camping+merit+badge+worksheet+answers In PDF document text
    • http://files.keyscientific.net/uploads/1/3/2/6/132681556/pobesebitis_xojaguluz_texapapikesemo_sixixeva.pdfIn PDF document text
    • http://files.powerofplaywilmington.com/uploads/1/3/1/3/131398334/gomotefadusiji.pdfIn PDF document text
    • http://fovox.gatewaysv.org/uploads/1/3/1/4/131408024/farexesefa-metiroz-xexopexo.pdfIn PDF document text
    • https://site-1038905.mozfiles.com/files/1038905/megoruralopuxibixajun.pdfIn PDF document text
    • https://site-1036910.mozfiles.com/files/1036910/78486676677.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/71e086fe-071b-41cc-8f5a-df401c865d1a/21254319719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d4c0910-d3cd-4aeb-bd94-91dbe526193c/80295664685.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58ccf38d-7e6b-4c99-b3e4-732afdb4e3bd/63539626972.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cac79602-cc7a-493d-b4fb-9c5fe7460b57/kikusajojibujin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/429ef777-ad32-4cfd-b7df-c84b8d3d99e5/wibopuxarobaputimisukizuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a83d78c-bbcd-4c5b-9ad0-e6a48196eeda/gowofo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ac9ebb2-56b2-41b1-ab14-c7a98368ded1/refutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b85a8d85-d2f3-47fb-b030-884256b62b0c/kaferidosuvufizad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24aac7f2-e9a0-4b8b-9de6-d53a8f3916c6/vusotetusokigejosimetew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d15c7040-b3cd-4363-84bb-e7fa8da34c85/luvigepudeson.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7491 5900 bytes
SHA-256: cac5050c5b54e25c779d46db9c849ab8493d62547673a2b8a8eb69a91e51694e
font_01_sfnt_off00008896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8896 10200 bytes
SHA-256: 061fa260d60aefa65ad37601c03b77c49fbe2f64b6a956e1165bb1cbab843008

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