Malicious PDF — malware analysis report

Static analysis result for SHA-256 33286d5e32616182…

MALICIOUS

PDF

43.2 KB Created: 2020-10-07 04:29:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: b0c466151873becfcedf8cf6899459e7 SHA-1: 32dd54b6d0796edd03b61b2520d0a8b844112267 SHA-256: 33286d5e326161828bdb6e1b24f18565e6292c83ea258beff2942f420703d20d
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://gettraff.ru/pify?keyword=cochlear+implant+nucleus+7+skins In PDF document text
    • http://files.kauaicleaningdoneright.com/uploads/1/3/1/4/131454521/5213611.pdfIn PDF document text
    • http://files.mtproductskauai.com/uploads/1/3/1/4/131407952/bixotan-xepixebiko.pdfIn PDF document text
    • http://files.printer-graphics.com/uploads/1/3/2/6/132681390/natetu.pdfIn PDF document text
    • http://kijujabes.kennerlyclay.com/uploads/1/3/1/4/131453022/finatoponez_ruzimomapapa_bezis_belorokininas.pdfIn PDF document text
    • http://xefugubo.judyzpiano.com/uploads/1/3/0/9/130969220/pakexeroxib.pdfIn PDF document text
    • http://files.tieslerphysics.com/uploads/1/3/1/1/131163579/7979326.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/1/0438/6711/1584/files/maquina_de_coser_brother_ls_2125_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/7320/4124/files/map_skills_test_3rd_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0696/6430/files/3838655773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0462/4021/files/16256589175.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5275/2283/files/67483692397.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1137/4230/files/lakewood_library_dallas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/xaxaforogijobafevorivajus.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_off00006986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6986 5220 bytes
SHA-256: cc824485149a8ccb2fc1a9fd9c713fc9ffaaa9993a1bfa74f0adf30f27ec8a82
font_01_sfnt_off00007b1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B1F 10832 bytes
SHA-256: c852a7f9807c93c43a0a4ae7138eb34c0a82ff57d280ff9805308394d8af7290