Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fb39052c5f41875…

MALICIOUS

PDF

45.2 KB Created: 2020-10-16 05:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: a323da16e43fbfdebf89dcd6a2fdf0fb SHA-1: 1cb62786eb1eea7ad28273a833485d65032b5859 SHA-256: 3fb39052c5f41875e7120d1cf6b97189e76dbcd9068f40b0ce3cd2c922fd23b1
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=6th+grade+standardized+test+practice+worksheets In PDF document text
    • https://site-1038738.mozfiles.com/files/1038738/98405301232.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/7463368.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/6069273.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/makogopugavobepa.pdfIn PDF document text
    • https://welavofewefose.weebly.com/uploads/1/3/0/8/130813025/4962f40f8ebf93e.pdfIn PDF document text
    • https://site-1038323.mozfiles.com/files/1038323/43148541724.pdfIn PDF document text
    • https://site-1048184.mozfiles.com/files/1048184/fibrilao_atrial_usp.pdfIn PDF document text
    • https://site-1039197.mozfiles.com/files/1039197/mozakopezuzujomuga.pdfIn PDF document text
    • https://site-1039273.mozfiles.com/files/1039273/timebogumifuzu.pdfIn PDF document text
    • https://site-1039535.mozfiles.com/files/1039535/suruzen.pdfIn PDF document text
    • https://site-1036910.mozfiles.com/files/1036910/sewugerutalabepobutas.pdfIn PDF document text
    • https://site-1041845.mozfiles.com/files/1041845/6041296587.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/1/0428/4488/1059/files/megozebopoxedibavuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3379/5477/files/what_is_the_will_of_god_for_our_lives.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3356/5096/files/a_hayes_town_house_plans.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9254/4162/files/dujisikitud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2147/8299/files/car_show_judging_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7364/9822/files/kenmore_70_series_dryer_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3097/7434/files/cold_steel_voyager_xl_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1528/8986/files/15857758072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/7943/3113/files/wheel_and_axle_definition_science_term.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_off0000701d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x701D 5568 bytes
SHA-256: 6b2a8fae55441916961f64424633e774f888751b2fc7993c43d3aa8bbba7109e
font_01_sfnt_off00008318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8318 10848 bytes
SHA-256: 5acb784b26218f429f85d7faa108902b93364fef13036b71aceeac38fe1f34bd

Open this report in the interactive analyzer, or submit your own file for analysis.