Malicious PDF — malware analysis report

Static analysis result for SHA-256 d805fe532fe5d143…

MALICIOUS

PDF

45.0 KB Created: 2020-10-02 16:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1ad5cad6cd57b5a385e4f727584e40ce SHA-1: f804ae75d624b65de0d11e4e1989526097d0a898 SHA-256: d805fe532fe5d143d517944df1a437600234fc26046de50ebceed58cadfa0b90
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=washington+manual+emergency+medicine+pdf In PDF document text
    • http://sisil.suisunvalleyfillingstation.com/uploads/1/3/1/3/131383629/3461190.pdfIn PDF document text
    • http://rebil.courtneyfordart.com/uploads/1/3/0/8/130874429/miniz-nojukadazomotu.pdfIn PDF document text
    • http://files.msdengineers.co/uploads/1/3/0/7/130776603/babuxabuwiju-wejigokexit.pdfIn PDF document text
    • http://disarab.loblollylabradors.com/uploads/1/3/2/8/132814343/xenujenumavu-wexotusede-gegop-selopuleb.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://uploads.strikinglycdn.com/files/a4e7b78c-151c-4cd8-9f7e-31228fe570be/20896897690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73b5226e-f3aa-47ec-a687-466fc09ad0c4/jemufavoninilusarox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4124c96c-0d58-4e2b-bc1e-cb438e6846de/62902272404.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fd380ba-851c-4281-ac23-a68043665070/25354876627.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1f2adc3-c3f7-40e4-bfc3-04817c1dcd11/taxolefaxarajiveguvib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ca20d00-cedc-4a2d-b0a8-2ca6a90597df/jitide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/199ec09a-662a-40fe-808b-bc0110ec94f8/90476777187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eaf932b-fd66-4d66-95ff-d20e92387f06/lamidoxobek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0414/8381/files/thermal_expansion_definition_kid_friendly.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6610/9335/files/mcgraw_hill_geometry_workbook_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1805/0984/files/robots_full_movie_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6598/2632/files/lumebuworofixifugejinijop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3085/7886/files/25223009693.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_off000062f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F5 5564 bytes
SHA-256: e83939e23d4f9757d77fd022154b45e4b30126e9034d5deacc5eded1a6d5d726
font_01_sfnt_off000075be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75BE 10228 bytes
SHA-256: 87583974fb52e59566817f3e5689b6ce34da451416339ad60c5d97ef9dcdc3c3
font_02_sfnt_off0000988e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x988E 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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