Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5a67fbb95b53723…

MALICIOUS

PDF

43.1 KB Created: 2020-10-16 12:30:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5d94a56fb597ab70cd13fc2a7fbffce4 SHA-1: e23336369bd9832856bc10b5e94570bbe3773da4 SHA-256: e5a67fbb95b537235af62e6ff8066f56d83bf1b94fcd8d1e9d280d17133eea45
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/pify?keyword=dna+molecule+and+replication+worksheet+answers In PDF document text
    • https://tegugozitofo.weebly.com/uploads/1/3/0/8/130874592/vowuwujodelevure.pdfIn PDF document text
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/banumufusuzenogepobo.pdfIn PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/vikim_peweped.pdfIn PDF document text
    • https://xonimitofowe.weebly.com/uploads/1/3/2/6/132682232/patevenebepil_fugape_rojoxirukali_gabixosogagi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366973/normal_5f877027089b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f874ea7e7a72.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/1/0459/0285/6346/files/ielts_reading_strategies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3366/4922/files/duel_at_araluen_weebly.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6207/3246/files/sakinijupet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8381/5325/files/98655019951.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2376/2086/files/ninadofesap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22eea8d6-1d90-4e06-8013-e38f2e6a4e45/najinukinapudifukufulexum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6cd9b96-67ad-4bfc-8152-6654fe6f747d/kapapadudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f10596d-59b4-4b57-b926-c9d5f93fdf75/81905744732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bb9d110-cb41-47db-b92c-8444c9476b2d/92335894361.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/0129/4243/files/comm_109d_ucsd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9285/9798/files/nunijomuwejinonemap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7725/2760/files/hitchhikers_guide_to_the_galaxy_theme_ringtone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9028/8034/files/rebulomosifilu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3092/8279/files/dukadipavigenakofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1575/6181/files/download_gta_5_mod_apk_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5850/3590/files/zelapaxojavopidobaxip.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_off00006abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABE 5468 bytes
SHA-256: cc5fb682f05f557ab7b31ee71ce6e19d2a865b4da0c92b048192dc1d76c2f1a6
font_01_sfnt_off00007d3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D3B 9744 bytes
SHA-256: 1f4668cfafb0c88cf8af32726dc9af928e1d1da076214728b2bae3b2277556fd

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