Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecc467b5a114687d…

MALICIOUS

PDF

42.3 KB Created: 2020-10-06 19:31:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 943d772663783cf3852ff4f18536a51a SHA-1: 1b12b656acac7af51ead5b09ddfe497124fe263a SHA-256: ecc467b5a114687da8ff5a180bb2cdb573d3906ccbfe94903fcf9ba57b98d353
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/strik?keyword=minecraft+sphax+purebdcraft+1.14 In PDF document text
    • http://files.goodstuffbyshalonne.com/uploads/1/3/2/8/132814589/c587a08383434.pdfIn PDF document text
    • http://ribiziz.andrewandykeithanderson.org/uploads/1/3/0/9/130969723/f5f0386f64e2dd5.pdfIn PDF document text
    • http://files.magpieandsquid.com/uploads/1/3/1/3/131380759/2072374.pdfIn PDF document text
    • http://vobemol.egyptchronology.com/uploads/1/3/0/9/130969352/3522470.pdfIn PDF document text
    • http://fuxeli.thefiveelementsretreats.co.uk/uploads/1/3/0/7/130740118/pawuvuketopog_gipugu_pexirugasunoku.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/afb98ff4-fe3f-4ceb-a219-bdc5c59cd2ef/75687485709.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95349f44-1970-473c-8c78-4004d9b562df/bikisefomozijoxujilitaguk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c080acbe-0e93-463d-a59e-8b1b226cbe45/79408243806.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0a0d0ca-4d06-4197-81b9-337e45cd7a25/46976835806.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40d36d9c-322c-4d31-b23c-b9385d93e74b/danibaka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a905cdd-c7c8-4096-980d-aa2e13f24cb0/17824118307.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b77603b4-a17e-425e-9f05-a9790dfc66b9/gexexaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/007db5bc-52c5-4474-b27e-7a887a5f28e0/vorizaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f7cc57e-32f2-427f-8984-b99c23562b32/gitidereso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbe90885-2619-4d53-b2d6-62512204d4ef/betemujirusaxedufideribob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/876e8495-a06a-485f-b749-b4cf61d16273/39999273757.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_off00006421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6421 5596 bytes
SHA-256: c6554620db2a9a4f0f138e608d0640c0c57fdfe829e3a93892cc1856340a832d
font_01_sfnt_off00007741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7741 11556 bytes
SHA-256: 518284b8739362fcfe13314bacac7080dbd4bb6a9a6f632563b68d1e12f733a0

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