Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a9c189883f9e90c…

MALICIOUS

PDF

55.2 KB Created: 2020-11-04 10:16:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 9bc1a33226993c53f1aa7c7be7db597b SHA-1: 4ecd15f0eaaaa475487fe1e5139efcbbe241ff30 SHA-256: 2a9c189883f9e90cefcd640c4c1068a847ec0b465f75d34274b9ac35b6c6058e
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/aws?keyword=centriole+in+mitosis In PDF document text
    • https://cdn-cms.f-static.net/uploads/4410415/normal_5fa23191f3f62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427091/normal_5f9994cc7dca7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369318/normal_5f88d846cb10c.pdfIn PDF document text
    • https://wuwotozon.weebly.com/uploads/1/3/4/3/134315251/a8a330df8f03e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368969/normal_5f8940aa9c8f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406456/normal_5f9ed496db76d.pdfIn PDF document text
    • https://xogunepole.weebly.com/uploads/1/3/4/5/134529021/dipuse.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378378/normal_5fa212349a74b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369797/normal_5f8ea28581bc9.pdfIn PDF document text
    • https://tanifovekula.weebly.com/uploads/1/3/1/3/131379991/surowezowoseguz_dural_kuxowaxeredo.pdfIn PDF document text
    • https://bilimetib.weebly.com/uploads/1/3/4/4/134435282/275873.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/8e35096d-e39a-428c-8296-48dec9acc6bf/weider_pro_3550_cable_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfd9a6b0-35e4-4301-932b-3c35cb94c74f/frederick_leo_lionni_descargar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/685368da-8944-4400-9309-447de5d4717c/the_mendeleev_lab_of_1869_answer_key.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B70 4432 bytes
SHA-256: f96b309369d945cf966a041257faa5b13f3dc35e5cea35ec86caa5cc87cf492c
font_01_sfnt_off00009a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A56 12520 bytes
SHA-256: f45f871177ab49d64df9e678d648c07645919602acec94fe26a2d5208335639a
font_02_sfnt_off0000c1e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1E6 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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