Malicious PDF — malware analysis report

Static analysis result for SHA-256 7354b012892c6690…

MALICIOUS

PDF

45.2 KB Created: 2020-10-16 04:14:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 42708e9f73c17e199725bc58b09ee22f SHA-1: a3d9ece929d731851687cbc29eb92d713ac06259 SHA-256: 7354b012892c66900482172bd54ba40a164dfd1ce1063c38d0658e5332ca734b
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=download+idm+pro+mod+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368488/normal_5f88d093ab725.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369149/normal_5f8869c87e229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f887a3b5d749.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369646/normal_5f88dd080af8a.pdfIn PDF document text
    • https://xuwuperozaposa.weebly.com/uploads/1/3/2/3/132303395/4295339.pdfIn PDF document text
    • https://vawotitalu.weebly.com/uploads/1/3/2/7/132710714/dosagusuzu_kokufajodi.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/safado-fodidunixoso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/468c59ba-628c-4beb-885b-6bc6a532ce5c/30522032851.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bcaa0c8-ef86-4db7-9732-a306cfd243bf/17027960009.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76878e86-ac76-4fb9-b993-3793ce1c5495/vodijusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8604/5889/files/lisisojivugalukuxun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9950/3254/files/tipos_de_argumentaciones_con_ejemplos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0385/3476/files/combine_like_terms_with_distributive_property.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/5834/4348/files/14585975071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/6276/3160/files/fivowaragezovidetibasedat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1747/7019/files/esquemas_derecho_procesal_civil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6897/2444/files/zomapejujipo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1851/6637/files/mibanuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0792/4635/files/wilton_fire_dept_nh.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_off00007375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7375 5084 bytes
SHA-256: f4364271eeb68658cbbbd4b663acadf571343130cb5e22e4c43422d3fafb1a6a
font_01_sfnt_off000084b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84B9 10208 bytes
SHA-256: 1adfdf0984d57fd2a1276bd705ff6824f3b7e0483073bc6cc832dc9db3eb7e42

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