Malicious PDF — malware analysis report

Static analysis result for SHA-256 2592098492c662da…

MALICIOUS

PDF

43.8 KB Created: 2020-10-03 11:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e06535dcdc66230cb6d01cc724972b04 SHA-1: 217c43420a3f49bedfe55f051dabbeb1cc9bed48 SHA-256: 2592098492c662dafc3397ce19bf8bfce1df55757c1bbaeab5e71a6599c96312
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://ttraff.com/pify?keyword=paulk+workbench+pdf In PDF document text
    • http://files.thecarissafoundation.org/uploads/1/3/2/6/132695802/pezebewi_fabixuv.pdfIn PDF document text
    • http://tuxepow.highlandcreekranch.com/uploads/1/3/1/0/131070147/5834773.pdfIn PDF document text
    • http://files.civicrep.org/uploads/1/3/1/6/131637352/rikop-karibef-takiluroze-xibema.pdfIn PDF document text
    • http://xalawitu.heathercoleman.co.uk/uploads/1/3/2/7/132712615/0103c9d9c743a.pdfIn PDF document text
    • http://files.a3regionname.com/uploads/1/3/0/7/130775308/2464735.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/9d20ca38-c570-4250-82c4-231eba4625dd/jokelogomasuvol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f441448e-9169-49e3-9f39-8fd290eb73b0/50911561921.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/781d5227-e893-44de-8b43-2df1ae448293/65222963008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afb2e548-db4f-40ac-a422-6d4111a88bf8/79984238532.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fe859a0-b5cc-40c1-adc9-1467ae9b917f/95710675160.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6403/9326/files/zawetezifutoxudunebedober.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4463/4773/files/hillcrest_elementary_school_pa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7628/3293/files/8881379634.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0469/0028/1504/files/winter_earmuffs_near_me.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/2117/6479/files/pioneer_202_metal_detector_manual.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_off00006d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D75 5360 bytes
SHA-256: 63cd5f0459d832395d040a84c3d3c8e6d0c8b24595111b094722da2335dae513
font_01_sfnt_off00007fb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB8 10064 bytes
SHA-256: a1f11890bed28d155746d3defbbb65580ce77e17fbb0aefaa62d246746707721

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