Malicious PDF — malware analysis report

Static analysis result for SHA-256 da1302f853911006…

MALICIOUS

PDF

41.5 KB Created: 2020-10-31 04:41:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 2173288d65941886a8fb61cf75d7bd28 SHA-1: f9423749ae09e8750647bde1c1ea4e7395279f00 SHA-256: da1302f8539110060c810bc6935e1788eca93ce49ea78732023e125edc437240
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=a+better+man+louise+penny+ending In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368492/normal_5f8e38d091ea4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/17139872474.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3965/2516/files/68977652714.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/eight_nation_alliance_flag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/0695/6970/files/in_the_11th_century.pdfIn PDF document text
    • https://s3.amazonaws.com/lodunixodetum/voting_rights_act_of_1965_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5474/3200/files/mitochondrial_genome_organization.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/2241/8839/files/37773980687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6112/5013/files/49346909352.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/97037639992.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/munexejurisedib.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/zepananimipapotor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/1730/3739/files/clarisse_la_rue_fanart.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/lirasaxam.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_off000062c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C4 5512 bytes
SHA-256: 4bcf69aca259b801ed7a9b616e74b1cb3a4e2471a14b3d99eb2409776b20337f
font_01_sfnt_off00007569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7569 10688 bytes
SHA-256: 2311f1381959598fff289002e0a3d7e7d79ad6800c3def07da8e6244493f42bb