Malicious PDF — malware analysis report

Static analysis result for SHA-256 182c7952c9bff707…

MALICIOUS

PDF

57.4 KB Created: 2020-10-07 12:19:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 79efcb6a5eb49d71430342a8dbc13add SHA-1: 7c6ee97e16a2e0ff59c57cb08fa698825949a94c SHA-256: 182c7952c9bff707c270210d0207a7618e62aa8d9b577dc5a26290dd70aaf18c
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/strik?keyword=ambiano+omelette+maker+instructions In PDF document text
    • http://files.hacobian.org/uploads/1/3/1/1/131164386/mefesikexopavanevimi.pdfIn PDF document text
    • http://files.katiemachain.com/uploads/1/3/2/7/132710621/doduvetakojo.pdfIn PDF document text
    • http://files.stefanodenicolai.net/uploads/1/3/2/7/132712514/c741f.pdfIn PDF document text
    • https://site-1040437.mozfiles.com/files/1040437/jakesogewaginipoxerede.pdfIn PDF document text
    • https://site-1038548.mozfiles.com/files/1038548/tefuk.pdfIn PDF document text
    • https://site-1042969.mozfiles.com/files/1042969/refogudapenanagowar.pdfIn PDF document text
    • https://site-1040618.mozfiles.com/files/1040618/1321222299.pdfIn PDF document text
    • https://site-1038618.mozfiles.com/files/1038618/71628512737.pdfIn PDF document text
    • https://site-1043933.mozfiles.com/files/1043933/puzegujozop.pdfIn PDF document text
    • https://site-1037261.mozfiles.com/files/1037261/nufedebebununovumiloja.pdfIn PDF document text
    • https://site-1039899.mozfiles.com/files/1039899/88520048263.pdfIn PDF document text
    • https://site-1038508.mozfiles.com/files/1038508/59842189898.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/1/0432/3655/6962/files/69852843387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0953/9747/files/62335375775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3337/0522/files/sewing_machine_extension_table_husqvarna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1372/9187/files/woxaxalipatejuvuzikaruz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1630/5312/files/25448293878.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000899a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x899A 5020 bytes
SHA-256: ddc623204c64ee4ec1e9df33d04c58c6aec4076e56aa8487313d7fd3cfd5b9cd
font_01_sfnt_off00009a84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A84 2424 bytes
SHA-256: 68503592a9b13d04c66d91ddf83a4f791ee3d30ad04418e07f32f6de173285b6
font_02_sfnt_off0000a406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA406 11100 bytes
SHA-256: 4c6be9302daa339f11068b9cd9f6eded1c7d40e5586fac218a71ad584fbcc1c8
font_03_sfnt_off0000c9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9BF 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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