Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed962e72ecc6620d…

MALICIOUS

PDF

32.6 KB Created: 2020-10-09 17:11:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 2127ebc9032063c0f52446ab3947095f SHA-1: 49060b80324ce2f3bb6a032cf62bbdfd0da731b4 SHA-256: ed962e72ecc6620dfcf20e4d5836307447bd77a3944249e16f5c0775ac9d9c9d
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/strik?keyword=atoka+elementary+atoka+ok In PDF document text
    • https://site-1040322.mozfiles.com/files/1040322/13788089506.pdfIn PDF document text
    • https://site-1038573.mozfiles.com/files/1038573/43702120278.pdfIn PDF document text
    • https://site-1039693.mozfiles.com/files/1039693/38795517342.pdfIn PDF document text
    • http://files.christiancoelho.com/uploads/1/3/1/4/131411281/gubowabiz.pdfIn PDF document text
    • http://files.dkgalphachapter.com/uploads/1/3/1/4/131482887/nefof_difojokemeforer_jivuxaduzapaf.pdfIn PDF document text
    • http://files.marilynandco.com.au/uploads/1/3/0/9/130969297/pulovevejepubujor.pdfIn PDF document text
    • http://files.teamworksart.org/uploads/1/3/0/8/130813841/telivutinevamon_pimudo_sobojibamosivi.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/1/0469/9799/5672/files/sdsu_gsp_practice_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4557/7116/files/simple_trig_equations_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2478/7867/files/brian_leslie_vaughn_forensic_files.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8583/9003/files/loving_tv_series_cast.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0295/1842/files/zinibepow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9548/5352/files/ganig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2690/1924/files/lg_c8_vs_e8_vs_w8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4075/3822/files/rizuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8847/2983/files/pitowaminupi.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_off0000462a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x462A 4808 bytes
SHA-256: ace569f2a6cd4e8d572923aaa06221bd1c27bbaed6c56b488f3352a050bbae74
font_01_sfnt_off0000567a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x567A 9160 bytes
SHA-256: 0d794059fa5f8f118695ad3e1a10f847551d86a2f7b536872520be6dfc761bb6