Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e395a6abc77f97b…

MALICIOUS

PDF

48.7 KB Created: 2020-10-09 07:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 68b25d09d8d87fc731acd5b81876d897 SHA-1: b5386db31f4e20a451500405f63b7181b7824b16 SHA-256: 1e395a6abc77f97bf6aab148f199608fe10564f1b8139818cbf7499cca32e343
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/strik?keyword=c+primer+plus+6th+edition In PDF document text
    • http://files.adventurerefined.com/uploads/1/3/2/6/132681213/3264884.pdfIn PDF document text
    • http://bireledob.marvinbermanphd.com/uploads/1/3/2/6/132696558/3153507.pdfIn PDF document text
    • http://files.summittrainingspecialists.com/uploads/1/3/1/6/131636727/losifekanipo.pdfIn PDF document text
    • http://kavot.classicadventures.co.uk/uploads/1/3/1/4/131482995/wabakigususobel.pdfIn PDF document text
    • http://kinafobo.duralumbuildingcenter.com/uploads/1/3/1/3/131398285/zokimiwu.pdfIn PDF document text
    • http://xezibi.tcfastpitchshowcase.com/uploads/1/3/0/7/130775288/4859377.pdfIn PDF document text
    • http://motalu.merrillsoccer.org/uploads/1/3/1/8/131857243/d3d91c1f501f.pdfIn PDF document text
    • http://files.fiam.info/uploads/1/3/0/7/130776644/a061011.pdfIn PDF document text
    • http://files.clintweiler.com/uploads/1/3/0/8/130813694/3f3f9e98f8c1ceb.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/8e8c1823-1d18-48df-bfb9-2f24af7d144c/41183002865.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fd4f4c7-a3fb-4312-9bd6-2cf5b45eb2d8/27460371097.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eac8d9b-a4fc-463d-aa4f-1c03245719ad/semudalabudixoruja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/140b00a4-271f-4cca-9429-f474819258aa/69466298268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/634a25b6-d6e7-43eb-93a4-387000d2952f/11910124237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8602/4356/files/43125163786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7539/0625/files/gizmo_titration_worksheet_answers.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_off00008167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8167 5048 bytes
SHA-256: 7e3fa6318389b817aba147d051d5016720a4e8bdab2682c58f2ae00bd6a7e5f3
font_01_sfnt_off00009261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9261 10532 bytes
SHA-256: f0a10deb99643177c37c3fe7abf7a77cdc04925360ff846ddc5f92cbe31a05a4

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