Malicious PDF — malware analysis report

Static analysis result for SHA-256 9918036d222b165b…

MALICIOUS

PDF

59.0 KB Created: 2020-10-15 11:30:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4054f8e7c2313c7a4380b15e8c1ba653 SHA-1: a87b15d06aeca23de441103db65cf0fb8faad92e SHA-256: 9918036d222b165bef6e28b9dbcbe7c2ba5699386a3108ab6ed743c9c8e7469f
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=ejercicios+de+caligrafia+para+adultos+pdf In PDF document text
    • https://site-1043571.mozfiles.com/files/1043571/sipawir.pdfIn PDF document text
    • https://site-1039539.mozfiles.com/files/1039539/vasirimijijotuwavobuz.pdfIn PDF document text
    • https://site-1037212.mozfiles.com/files/1037212/76119222420.pdfIn PDF document text
    • https://site-1040321.mozfiles.com/files/1040321/81005481783.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/gamete-fikitixax-devuwodawu-xutof.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/foburadip.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/5175097.pdfIn PDF document text
    • https://dedotomonifagax.weebly.com/uploads/1/3/1/6/131606429/zewafiraserad_bikel_tisev_minuv.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lukuxaluk.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/nojof.pdfIn PDF document text
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/zipijagaxegex-kasoxowexej.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/8742796.pdfIn PDF document text
    • https://gidixelasulam.weebly.com/uploads/1/3/0/7/130739099/bff2299f02.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3093/6733/files/83922448979.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6377/1293/files/vabokuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4560/0931/files/wii_channel_file_manager.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4483/1386/files/30940393974.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4012/6614/files/models_attract_through_honesty_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5901/9421/files/zoxidosizenu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df7267d9-26a7-42da-a60b-d50c3ab25b1f/xafopemosatebefewidajut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f013aed8-e02b-42e3-9bea-534e4b339fd9/84126617459.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76A8 5132 bytes
SHA-256: 44b2b5179d4c3a76c5cf14bdb5bbab364f52668b32e69631c6c3ff961a0c0d53
font_01_sfnt_off00008836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8836 2092 bytes
SHA-256: 9fcfd2b2c12c9d480c0beec3ee39f05b9e518edc5177a7a5fcc68dff0371f8a2
font_02_sfnt_off000091d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91D7 11412 bytes
SHA-256: d1d1a6bf77aaec431302ba0745051caee665bfd0e3090a9f44166640d5da8db8
font_03_sfnt_off0000b70c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB70C 16488 bytes
SHA-256: 62983dd010b7aa238131a5b5fc9b5234e97605aad009cac054b686215e957981
font_04_sfnt_off0000cd79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD79 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3