Malicious PDF — malware analysis report

Static analysis result for SHA-256 745d773cfadd5760…

MALICIOUS

PDF

36.8 KB Created: 2020-10-27 00:24:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: f443d422edac409a97d0d5098dbf00e4 SHA-1: 6b6550bc1f8ea5d1f8f8051352e44db3764862fe SHA-256: 745d773cfadd57609283a190db19b045d29271cfda00476785a0938e57d86dee
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/123?keyword=wow+iridescent+pearl In PDF document text
    • https://gewosawoma.weebly.com/uploads/1/3/0/7/130739201/wivopuk.pdfIn PDF document text
    • https://romovemesokawaj.weebly.com/uploads/1/3/4/4/134479736/viwakozu.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/bovunolijerumupi.pdfIn PDF document text
    • https://kelabuwak.weebly.com/uploads/1/3/4/0/134098394/wanuwepuxefu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/50349480364.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/hongos_ascomycota.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/mevavowal.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/wanedupowexo.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/majexijibunalonuwemagoz.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/skf_bearing_catalogue.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/business_communication_essentials_4th_edition_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eaf7fcc-30e4-43d4-902b-98f4699b3c08/cole_sanders_age.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63ef507a-b485-497e-81fc-51d1863a56a8/76333023156.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34e65d60-3080-4abf-b791-7b62418eb9de/56541253985.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdc36c76-64d6-42e1-97b6-86bd11079b85/vekubovabegud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f3a5be7-70ae-4be2-9ed3-20315755817b/vadon.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/bobotigefiruguluwuwe.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/adverbial_phrase_and_clause.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/zesakubutixuxafofemixu.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/advanced_computer_architecture_kai_hwang_google_books.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/zogexu.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_off0000504e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x504E 5172 bytes
SHA-256: a1aa4961a33d688744b7631d09e94843c502b1f1f99792b68d1453c34d04c01b
font_01_sfnt_off0000620c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x620C 10564 bytes
SHA-256: 443874237fa211bfc2618896a1365f160cc6ef53396e2b6cf9de622e68aa2d6e