Malicious PDF — malware analysis report

Static analysis result for SHA-256 28d04436aa164471…

MALICIOUS

PDF

40.3 KB Created: 2020-11-07 15:22:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: d697c5841bb208409aa800a827e5a3ac SHA-1: 91988196515b218d4e94f0565905aad8d6db616a SHA-256: 28d04436aa164471267454a668000b015576e120c6a62f5dc92c68f161d97f7e
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://traffking.ru/123?keyword=agave+oil+and+gas In PDF document text
    • https://bidutujube.weebly.com/uploads/1/3/4/4/134403342/cd714.pdfIn PDF document text
    • https://beperiguvo.weebly.com/uploads/1/3/4/3/134320750/15a143.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372087/normal_5f93237862646.pdfIn PDF document text
    • https://pajedurozibije.weebly.com/uploads/1/3/4/4/134446399/30cd2.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/d4fa9af8-a58d-4ec1-8820-98f80a81fa84/zenumejakamozigesuwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1729bd9f-fa2b-4224-9723-c57c04df7d52/xaburu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/258b5dd5-3a89-432d-ae6c-d4e66c52f6d8/16333004940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb7b33a9-6db3-4583-83f0-ae6f6c8ab8a4/12096373069.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3dedde9-f6dd-472c-920e-f78d48e712ab/38971607156.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/947d7b53-4a50-4880-99f3-b9a2765c0efc/68725868472.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92cad3ca-4d29-446b-854d-756b83354463/2703228049.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4ff9b10-0f80-4c8d-b984-b59917647148/goal_zero_guide_10_plus_adventure_kit.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_off00005e9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E9A 4948 bytes
SHA-256: 7afe4818fd3abbce9f57496d30c849cb96c4cf829dd31990c8c44b1c9f73cc53
font_01_sfnt_off00006f89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F89 11408 bytes
SHA-256: 34dd08398b4b32fbdccb66e41051c6430f4aead0ee4b9c02069ab63ade364ec6

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