Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd96dade63ea801…

MALICIOUS

PDF

40.8 KB Created: 2020-11-06 14:23:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: f5b0e6f82e457591ff6ac9c410277b67 SHA-1: 19a1e2b8bc4c5a04aca8eb90fd1777c248b11061 SHA-256: 3fd96dade63ea8015da7c3883021dac53276eaa5ef3a1ca61a8fffcce720262b
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://traffking.ru/123?keyword=driver+license+number+ca In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380692/normal_5f9dae6773a72.pdfIn PDF document text
    • https://jezaxegare.weebly.com/uploads/1/3/1/3/131380636/sotivugijabosasawivu.pdfIn PDF document text
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/fakesonadusiza_nenuned.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/e5c8e3d4-d4cb-4e37-a54d-ddf25554e6d9/skyrim_unbound_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/important_questions_for_b._com_1st_year_financial_accounting.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/82577421052.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/tonalakox.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/36332117358.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/water_molds_biology.pdfIn PDF document text
    • https://s3.amazonaws.com/temuxow/lobekunaluwekij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9850b8b7-cfdc-4a3a-ab38-7d225a169a9d/95174795588.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/tebikotari.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/gilelori.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_off000061a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A6 5144 bytes
SHA-256: ab4977842a122cfc6b478c702c4a8620a1b883d4d980045c43cab4395c0df88e
font_01_sfnt_off0000731a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x731A 10440 bytes
SHA-256: e6f1d3513c83543ef8105d347882bc3bd4694f16dfa9d6d8049aad1a929b806d