Malicious PDF — malware analysis report

Static analysis result for SHA-256 906e86ee7cc34e81…

MALICIOUS

PDF

68.1 KB Created: 2020-10-10 22:29:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 17baeea13acac39cb5330ade327127b0 SHA-1: 4992a0fccfda5fb38c4f65878948392dcf53ab24 SHA-256: 906e86ee7cc34e8132e892ad3a77f884a7042fa794ffdc230690f7681e7db257
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/pify?keyword=bdo+warrior+guide+2019+ps4 In PDF document text
    • http://files.azaliarealestate.com/uploads/1/3/2/6/132682661/zokagirinojame.pdfIn PDF document text
    • https://site-1039610.mozfiles.com/files/1039610/40004367115.pdfIn PDF document text
    • https://site-1039892.mozfiles.com/files/1039892/sinuzemakefekoposetakafi.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/9e602df2-3139-4778-b56c-bc77d77b8d6c/45888151772.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccbc0509-cba6-4e8f-a1db-ab1c718623c5/50050548966.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a34e6dc4-712b-4e76-a706-b6dd7877b503/vibukirow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9887d8df-fe0e-4406-aec3-e4e399ace14d/kigufumaviramurifij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87091d03-f941-4d44-bf20-1ef83b77133a/dopid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3389/8391/files/dedatebulorowafup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8008/4384/files/61768488546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1670/5432/files/relative_velocity_problems_worksheet_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/23452740463.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7807/2985/files/the_lovely_bones.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_off0000cbdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBDD 5808 bytes
SHA-256: fd1bb7b517de762a6f03b3713e823268ef8b4326b89297e7250ef784c10a842a
font_01_sfnt_off0000dfce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCE 10352 bytes
SHA-256: 7445af5b82c341126cce713aac7c30410f7fb89adbcaa21c6ef0a2c22a32bfff

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