Malicious PDF — malware analysis report

Static analysis result for SHA-256 176fdca4a7beaa0d…

MALICIOUS

PDF

35.3 KB Created: 2020-10-17 18:56:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: caa1923435a1d546fde54733a92393b5 SHA-1: 3276924fc0f9e8cb1e54548d78f1fe7f673a9c19 SHA-256: 176fdca4a7beaa0d6b4aadd1bc33f1f064c73fcf4c4744ac872e90272ee9a9a1
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://ggtraff.ru/123?keyword=dictionary+of+social+science+pdf In PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/613a711ec7ef.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/dozafawegikuxoto.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/aa94aa7f99c.pdfIn PDF document text
    • https://fidegobopoj.weebly.com/uploads/1/3/2/8/132815019/seraralobif_kotovuxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369514/normal_5f885fdddb4ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_5f89129f18905.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/34987967-6c2d-41c4-bf12-b453cf2d4c3e/rofefijenalekiniv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a2f351e-c185-4603-9e0f-c7b4bae43839/kutolewozosoruxowoferu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84c29c7c-9eda-43a6-b60c-bb93a0f63653/ginefozaxezafisutemam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af294763-e571-458b-a0d4-43f07f7e79f6/defudidezelumerasef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e9db988-6c02-4250-93a0-722a0408cebd/satepizujovumevo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61e14fd9-1c91-4b76-b61d-cf49cb697d4d/13584678477.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5320f0f3-7dfe-43eb-891b-2979038fc47d/42131244451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6071/4907/files/gene_expression_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2341/4942/files/juxanidevolutirujari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9942548-88cf-4fb6-8db7-150ccdc11411/49291289305.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5646d024-f1b4-4ed0-b07e-28cdbee4c377/51932665960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rabilividobakomitunaxizug.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_off00004a97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A97 5248 bytes
SHA-256: df1daa4a8dc71aafe1d952163b6f06138d23043ee92a338218918d707bc470dd
font_01_sfnt_off00005c86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C86 10448 bytes
SHA-256: 033d2595f02db104ad5dbbf504af3bc5ad124f23227d06e1c1b652a2e8a485f1

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