Malicious PDF — malware analysis report

Static analysis result for SHA-256 85003d785eaaf955…

MALICIOUS

PDF

40.0 KB Created: 2020-10-10 20:35:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 1eec0cf5ca9abd396e77386c073169a9 SHA-1: 6d53d6bc92390c01c8a47cab4d7a09a3174f3821 SHA-256: 85003d785eaaf955944129b2fa3ecf7b4d49eed765358496100f8add6c2a32b8
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=thomas%252527s+calculus+14th+edition In PDF document text
    • http://dufiv.hdfsbridgetwalsh.com/uploads/1/3/1/0/131070867/nomulisaj.pdfIn PDF document text
    • http://lemami.jcbotanicaldesigns.com/uploads/1/3/0/8/130874359/sorotemuf_zokawubopor_fomutol.pdfIn PDF document text
    • http://files.lovisbeautylounge.com/uploads/1/3/1/6/131606347/besodevigopok.pdfIn PDF document text
    • http://files.mindscapegallerystl.com/uploads/1/3/2/6/132683111/1329c.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/1/0433/4629/6982/files/47380238195.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5700/5215/files/vomexufofa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4293/8784/files/rally_in_the_valley_rock_valley_iowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3340/6871/files/country_research_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9813/5966/files/because_you_loved_me_letra_en_ingles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0701/5069/files/15000_watt_generator_harbor_freight.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3888/4519/files/chemthink_chemical_reactions_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0099/8305/files/rabipuzo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7478/3906/files/7th_grade_social_studies_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8334/9668/files/how_to_sell_a_screenplay_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8855/2870/files/64898726273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9917/1230/files/samsung_refrigerator_rf263beaesr_troubleshooting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8292/2646/files/two_tenants_on_lease_one_leaves_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4711/6191/files/54281451252.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1715/8312/files/12443113093.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_off00005eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EAA 5208 bytes
SHA-256: 2b5c49d376fa7bad09016eb4979e51c6e235906358128519ebe505461dddee89
font_01_sfnt_off00007047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7047 10096 bytes
SHA-256: a1ce9b3a5b801d2b8b9b0d03a7a40e4ef1b2d2cdfc236c2a3cd9105ad352fc67

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