Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7730226b1fe388b…

MALICIOUS

PDF

45.6 KB Created: 2020-10-15 13:49:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 196ef60536289133f870331f4d62d510 SHA-1: 42228ff2eeccc612a8bc5f4aa7ed1258e3302515 SHA-256: d7730226b1fe388b1bcaabe7d0374fae8412e898794cc56fcb8ca761479d6c92
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=general+electric+oven+steam+cleaning+instructions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366664/normal_5f875f7c1b7ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_5f8749723f3a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5f86fc6ccdff8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_5f87c10d28e44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366645/normal_5f87408680185.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5f873267ea328.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5f8725d2a0776.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f872fc64eef3.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/72183d84-0599-4530-a599-345c33418502/75118075952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8631/5684/files/31887227414.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6348/7897/files/geometry_dash_2.11_download_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7271/4920/files/kupiziguge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8626/5498/files/vesis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5730/7039/files/17096631865.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8534/1882/files/the_witcher_blood_of_elves.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3295/9912/files/sakobuvelusixepagefadi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1886/0190/files/90970681032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5008/1183/files/physical_and_chemical_weathering_worksheet_4th_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6227/1898/files/carlson_school_of_management_ranking.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9838/3545/files/56287635916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1731/2152/files/boperi.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_off000072ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72AC 5212 bytes
SHA-256: fe25ba753ec0d5d8f7bda3d34222bc0a29d54f81a549b8143af1ca28baa2f49f
font_01_sfnt_off0000845c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x845C 10712 bytes
SHA-256: b2e5e6e5cef86176a2e73c3a1b4af2e7d4a93c34bb446f32618c05a534efcf9b

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