Malicious PDF — malware analysis report

Static analysis result for SHA-256 945b497d2f782f33…

MALICIOUS

PDF

44.2 KB Created: 2020-10-09 23:54:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 73bdf8a75c86f67b0ba4e1dad88c967c SHA-1: b71a740fde24e5d66e1f046b9cc0fc62553dca1f SHA-256: 945b497d2f782f338ee7d263d07007914d920c3e876bd72e9e53280c14b8ecca
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=error+in+file%2528file+rt+%2529+cannot+open+the+connection+r+studio In PDF document text
    • http://files.miradorinternational.com/uploads/1/3/0/7/130739204/3618e8.pdfIn PDF document text
    • http://masixilid.thegamblingclinic.ie/uploads/1/3/0/7/130739732/8589229.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/1/0482/8846/5051/files/nikon_coolpix_s4300_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/9692/0230/files/san_bernardino_county_superintendent_of_schools_human_resources.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/5866/4102/files/40448014244.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1059/6775/files/741_area_code_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb4d1886-00b6-4a00-bc2c-952723eb19f1/koxukegovulujotodebewefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1d2a378-3b2f-4fd5-9c7b-003ed37cc761/55482877024.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7793/8583/files/83693954877.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5687/3128/files/99097023017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7947/0756/files/wajizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7038/2490/files/24380828906.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000604a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x604A 5236 bytes
SHA-256: faebcfea2aa7b42f033fe707b25f786323a8d098698ec4610ab682034d7af8c2
font_01_sfnt_off00007214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7214 10280 bytes
SHA-256: 7e93666340eeadba6f1de1b2c892b6d62ed3c694995e109a47cb756cc3571645
font_02_sfnt_off00009546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9546 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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