Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d89de9d26bfd0a7…

MALICIOUS

PDF

39.9 KB Created: 2020-10-04 16:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: edaaba32f546be5a95c273afbb5e986a SHA-1: eb789de05e8a6cbf0988f039f573c9b9c2d1973b SHA-256: 8d89de9d26bfd0a75b67ee6843e0fb5eda3262069c2afd2ebd230a6ad6ddcfa5
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=biografia+de+elvis+eberth+huanca+mac In PDF document text
    • https://site-1044496.mozfiles.com/files/1044496/bezufiwuju.pdfIn PDF document text
    • https://site-1044297.mozfiles.com/files/1044297/dazejonemoxef.pdfIn PDF document text
    • https://site-1041766.mozfiles.com/files/1041766/kemapem.pdfIn PDF document text
    • http://files.crochetliliom.com/uploads/1/3/1/8/131856314/mivug.pdfIn PDF document text
    • http://goleji.annawitte.org/uploads/1/3/0/7/130776367/48aa61.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/1/0484/2199/4648/files/devevimorezuwuteto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1529/4112/files/47887826981.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5549/6347/files/79015873628.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/4324/6239/files/mcmurry_organic_chemistry_9th_edition_solutions_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3409/9362/files/73629786470.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0469/0404/9824/files/lavixovesopasufiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8068/6495/files/juladidijokerafadawevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/0354/8316/files/transmission_media_ppt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8497/0139/files/reverse_fault_stress.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/ocean_beach_surf_forecast_san_diego.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_off00005d37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D37 5684 bytes
SHA-256: e2dc6cbb1974fe8997e5b4832cc3b79da9ce5252d4f816fa956fde2cdad1dfe0
font_01_sfnt_off0000706f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x706F 9948 bytes
SHA-256: aa3faf8aca1990d5362766bfa758fe8b73472e3c258d786067033f3263c58aa4

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