Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cbb46ff6e2a45e3…

MALICIOUS

PDF

42.9 KB Created: 2020-10-09 21:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: eb9fb468c41c1bcf065d3af1eea086de SHA-1: ffc089289eeabd729069be5c1e3be7290f5d314f SHA-256: 4cbb46ff6e2a45e3ed468a39a04d36dd9a3e35eab5a1e2911263991dbf114281
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=realidades+2+worksheet+answers+pdf In PDF document text
    • http://files.toastygoat.com/uploads/1/3/2/8/132815015/tinorugaropa-fuvifor.pdfIn PDF document text
    • http://vekovagib.neurodiversityconsulting.org/uploads/1/3/1/4/131453449/gofajosa.pdfIn PDF document text
    • http://files.pauseminicassia.com/uploads/1/3/0/7/130740202/e505773a7102c6f.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/9b3d5fc7-42a9-4260-be02-d1ae1624fd2e/42915620712.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21479898-e901-4943-8ce6-04a07f4c469d/32658574515.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac837212-7769-4f9f-a5c6-634f2595a0c1/87068421119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ab4385a-0942-499d-94c1-11f1bd078b16/rorusozitegedejobuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12d43544-ce7a-4569-b976-f36cdf7fc35a/56981780122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/1748/1635/files/nes_manuals_for_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6302/0193/files/zozirubanebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4895/5815/files/gameloft_live_download_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7960/0794/files/gerald_celente_youtube_may_2020.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_off00006ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD6 5424 bytes
SHA-256: 821b36394f02119e6238aee6c531179cd6b0621981487ec6d17012187edb94f6
font_01_sfnt_off00007d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5C 9824 bytes
SHA-256: 121d90c16bdb7fc5854343524d11bc6c66c4580a8aa326e654322595b8203eb2