Malicious PDF — malware analysis report

Static analysis result for SHA-256 5985fb93d1131172…

MALICIOUS

PDF

35.8 KB Created: 2020-11-06 08:29:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 2fc5e632b034109f98ae817deb2248b8 SHA-1: 9a7e082f5aedcc0b49c4bf279d20d5c294ed3e70 SHA-256: 5985fb93d113117267403ed379980ce200abe3607b8d3ed457cc6cafd89ca523
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://traffine.ru/123?keyword=kelly+gallagher+30-15-10+list In PDF document text
    • https://bonesinidojesu.weebly.com/uploads/1/3/4/5/134591006/1f9b17.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/fuzidex.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/fe512e6e-c3e8-462f-8b98-48074711fe8d/mini_dozer_for_sale_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3341404-868b-42fc-ac8b-a1f546054fc4/watozaxisonag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/598e3a65-7f37-49f3-983f-229e9acba664/juruvawakakotur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12a89329-9838-4d36-b2fe-a5e055f4e142/mezipigixabu.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/pokemon_sword_and_shield_strategy_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/2212/8580/files/zufozesavefukakebebi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/380b8061-640c-4d7f-a40a-747b5b388c28/zoxadumoragomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd6d556b-a3d8-4b76-9e94-b29d1ad45439/badivig.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_off00004c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C52 5532 bytes
SHA-256: 2cc46940e4c903f80b1f632c22e8894f0779bf43a8686030e1c480d779cb2e38
font_01_sfnt_off00005f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F39 11152 bytes
SHA-256: 5533ae7a9e66bba328ea7c0521f132aa7dd5e605fde9cc90f3684f7055c7c9dc