Malicious PDF — malware analysis report

Static analysis result for SHA-256 d56944092136efa5…

MALICIOUS

PDF

39.1 KB Created: 2020-10-05 11:40:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: b1fcac51b3dfbb7de49e504a5117939b SHA-1: 620f216e3d1bffe6c44127739edfa01fba13fdc4 SHA-256: d56944092136efa50821f4708146bf6e793fb2329a50e9c69ce6da4c98080644
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=anapora+at+katapora+worksheet In PDF document text
    • https://site-1041865.mozfiles.com/files/1041865/bunajadikula.pdfIn PDF document text
    • https://site-1042011.mozfiles.com/files/1042011/27195798189.pdfIn PDF document text
    • https://site-1041483.mozfiles.com/files/1041483/potib.pdfIn PDF document text
    • https://site-1039795.mozfiles.com/files/1039795/banebodisuxopijaw.pdfIn PDF document text
    • http://files.stmarkshudson.com/uploads/1/3/1/4/131408131/4247094.pdfIn PDF document text
    • http://files.nlg-pros.com/uploads/1/3/0/9/130969910/katixiratowapo.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/1/0428/7715/7542/files/a_mother_in_mannville_full_story.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9055/6568/files/63196356349.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4779/8952/files/32128148548.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8868/3932/files/belurosorabusu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4176/2727/files/wilder_vs_fury_reddit_stream.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca73905d-c330-4c9b-bca1-7b0f8cd7f244/nufosab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/582d6cd6-6945-4852-a18c-d17bc454eb19/66959889641.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ba78deb-a6b8-48e0-832c-16f033f7824a/dufer.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 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CBD 5020 bytes
SHA-256: c55879acf3b66203ee7eee40bdd7877292071be2ef2c111b8ac83bcdd9f9eb3c
font_01_sfnt_off00006ddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDC 10000 bytes
SHA-256: 6d5b95d4e390a9000180d3f553f1e56a5670cf5a16510a2e81b8bb1d82f9e2d7

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