Malicious PDF — malware analysis report

Static analysis result for SHA-256 507e9502188a1072…

MALICIOUS

PDF

47.6 KB Created: 2020-10-01 02:26:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c54f56181ff0ebe48203b8172fb186a3 SHA-1: ee5ed4a24988a789e02b6102bda3c98d601e30b8 SHA-256: 507e9502188a1072c677cd87f6c7fcdede2c150f83aee00dcc6053c73e85305b
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=kiran+banking+awareness+book+pdf In PDF document text
    • http://kijujabes.kennerlyclay.com/uploads/1/3/1/4/131453022/finatoponez_ruzimomapapa_bezis_belorokininas.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/1/0428/6735/9900/files/lipomomevowajekikepi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/burnout_paradise_full_setup_exe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5664/3739/files/94780646785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0794/2549/files/haggadah_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/pumazifewuzopubawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/347fa757-4219-4988-97d0-47ef65cb2a66/57417970343.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d18b597-f4f0-4435-b012-65d3f3796a37/95542639389.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d66cdd60-a164-4edf-b917-6817e4a577ef/vanajezukaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12b55cdf-52ed-4eaa-8567-636704dcf92d/mukilogujazuvinexuzimibu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/902fdf9b-9bd7-4c17-9e2d-a8f322a453a8/kixinazodupikofisubizi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6418 5444 bytes
SHA-256: e04b64602ca5f83d32bc3dd3240fba124e279e30167feb66d8c589b887327678
font_01_sfnt_off000076af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76AF 2116 bytes
SHA-256: 49f1c345582212729590e0456707ca92d3838aef8cba26fbcaa28f8c5b0a0640
font_02_sfnt_off0000807a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x807A 15348 bytes
SHA-256: c6e242b12db393537536f6b0b634346ddcd5c062049497acdac3e171fe7b658f

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