Malicious PDF — malware analysis report

Static analysis result for SHA-256 9117ae52fd6fe601…

MALICIOUS

PDF

41.5 KB Created: 2020-11-09 03:03:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 49aac61aee7bc68935b90d430f0759bb SHA-1: c2a2cbea45aa33a6cf5dba05f9a6e222398b6d8c SHA-256: 9117ae52fd6fe60131bfd42799555f677be4d5f811a20cdc0be602d31d5b1389
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=slim+quick+keto+ingredients In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380539/normal_5f945b80993b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5f93318b6c80d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387825/normal_5f8d8c6135f8e.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/5921cd41-f549-40af-aab7-28040abc5816/wukojigeberewebatazazi.pdfIn PDF document text
    • https://subonurage.files.wordpress.com/2020/11/nawawejipivavujipopufijeg.pdfIn PDF document text
    • https://botebofeji.files.wordpress.com/2020/11/15963812645.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb8022f5-9436-489c-baf0-67ef58300ded/miniclip_commando_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f21f0ec-3afb-41db-88a8-6fc341ca5db6/sexelozaloxepukurapunogen.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/16587671220.pdfIn PDF document text
    • https://jubivone.files.wordpress.com/2020/11/the_motley_fool_uk_investment_guide.pdfIn PDF document text
    • https://juvibix.files.wordpress.com/2020/11/wazasusegupaxusijip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33e5fcd4-9046-4a44-bf8b-5cfb562b77bf/38996815721.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00dde86c-90a6-44db-9d04-d8d029897c9b/51306976912.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_off000063c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C3 5340 bytes
SHA-256: 3ae239d402b663fc2030867059a50de6fcf61ae95457854de220420172896b4f
font_01_sfnt_off000075d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D3 10408 bytes
SHA-256: 10f2571569c9abacf1bbed091c7f2994103c63c70a42469958fbd8709e9a2829