Malicious PDF — malware analysis report

Static analysis result for SHA-256 90f13284e3071962…

MALICIOUS

PDF

44.1 KB Created: 2020-10-15 14:14:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2adaaa0b0c23001587c21d5ee53c9e58 SHA-1: 297b7f8da90262d3b69e8448c61d0fa743ac660a SHA-256: 90f13284e307196268c2f181721de9b517d581b8fdcbd379a43785448157c66f
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=clash+of+lights+s1+mod+apk+download In PDF document text
    • https://site-1039538.mozfiles.com/files/1039538/33356559985.pdfIn PDF document text
    • https://site-1038806.mozfiles.com/files/1038806/33781981101.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f871bb4eb12f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_5f87ac18ef423.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_5f873539b6eaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f8718afa5543.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f8781fdce386.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5f880c0158d70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366388/normal_5f87a86a019be.pdfIn PDF document text
    • https://site-1038365.mozfiles.com/files/1038365/67934567988.pdfIn PDF document text
    • https://site-1041492.mozfiles.com/files/1041492/91593189230.pdfIn PDF document text
    • https://site-1036894.mozfiles.com/files/1036894/49098877098.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/da65a5ca-6ba1-4bd7-b71f-ee62ada3f903/kepanudaterazeludebabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ef53587-94ff-4e62-b4f3-fd79aaf2c454/rodizoxomibakugepela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f3e4396-32f6-49c7-9af8-605dc2956f1d/1200322415.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88383220-47ed-4442-993d-cd521d920322/fozemujabidagudusabunodud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/199237c5-db08-483e-acdb-f059fc841c80/10831274783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11cc56ab-9d55-472b-954b-ca6be0e91d63/50319276291.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a2cd12d-a38f-4a9b-9593-b190915c3c47/33726866770.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c89ff0b-c3b5-43b2-9cbd-ab26bf19db36/22261531507.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_off00006dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC1 5472 bytes
SHA-256: a0750c2fb0dfc8344f34e49a7f8c67a373f864bdbd3c589091ad97ba05c3dd62
font_01_sfnt_off00008060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8060 10172 bytes
SHA-256: 9cb4f83f27f85a977d026d5650556dc2dc61eadbc364dc0603d4386db1a0b9af

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