Malicious PDF — malware analysis report

Static analysis result for SHA-256 74576bcbc8b09a7e…

MALICIOUS

PDF

44.8 KB Created: 2020-10-04 23:14:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 418747fc440a81eee85a0e85f5b4e535 SHA-1: 6c9e7b66a06bea33fc9703bdeb26927ecf8b1c12 SHA-256: 74576bcbc8b09a7ecdb7056050ad7d19ed83e6f2de1b17c5996ce2c8591d6e7e
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/strik?keyword=washington+manual+of+medical+therape In PDF document text
    • https://site-1036885.mozfiles.com/files/1036885/84353688166.pdfIn PDF document text
    • https://site-1038565.mozfiles.com/files/1038565/1563082935.pdfIn PDF document text
    • https://site-1039811.mozfiles.com/files/1039811/2060178012.pdfIn PDF document text
    • https://site-1039607.mozfiles.com/files/1039607/tebevofujitinezekovi.pdfIn PDF document text
    • http://files.thecenteryork.com/uploads/1/3/1/3/131383514/pufula.pdfIn PDF document text
    • http://files.myteachertoolbelt.com/uploads/1/3/1/6/131606475/621794c07f.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://cdn.shopify.com/s/files/1/0484/7629/1234/files/wujipesexajegupomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/7899/9960/files/85517467147.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/0338/0387/files/briggs_and_stratton_oil_filter_492932_cross_reference_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3421/4561/files/arcgis_pro_download_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/0385/5015/files/choices_hack_2020_without_human_verification.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9544/8999/files/tech_tool_supply_michigan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5174/7994/files/ejemplos_de_actividades_de_memoria_a_largo_plazo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6174 5464 bytes
SHA-256: 10ab71eea85bbe8e56047b1f013472e2cb7005f5330583cf97a50c33b5acd83d
font_01_sfnt_off000073e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73E1 10696 bytes
SHA-256: 51438ccc6c56800243c36ed105d075558389eaba1cfc60eca0174539422a3072
font_02_sfnt_off000097fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97FD 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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