Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e862727933b6d98…

MALICIOUS

PDF

46.8 KB Created: 2020-10-11 10:21:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: dd14a99367725e852e976ecafeb203b7 SHA-1: c967188b0bfa3f4ac3ed87f1ad8cc5452ec82338 SHA-256: 6e862727933b6d986a9d96124d1ee4a42280db88ccd425e9bd8c3305782b2f2a
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=recetas+de+martin+berasategui+pdf In PDF document text
    • http://lewelomum.saffronsunhealingarts.com/uploads/1/3/1/4/131453943/5d475eb3aa4e147.pdfIn PDF document text
    • http://files.floorexpertslimited.co.uk/uploads/1/3/1/0/131070161/a18057a5fbba46.pdfIn PDF document text
    • http://files.shangrila-properties.com/uploads/1/3/2/8/132815190/jaledewipaz_posikubavi_somibada.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/f30816eb-8f70-4ffd-9434-fbb41c95150a/28091529086.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6b77a5a-bc2d-4fc9-bfc3-a2b593e98285/94186944810.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c5fc49f-4171-4965-93e2-4a5b3e34bea7/87126093871.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de4aea1e-8fb8-431e-b058-a873df8e40b1/borozupegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0470/7491/files/sweet_and_awesome_minecraft_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/0245/8022/files/xumezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0386/1401/files/88917371501.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41fb2c91-7efc-4f72-b830-a3bf314234db/wajovafejamajewamofakun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63d6e28d-7cbf-4946-9611-d9d590aec03d/pusapigarolaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a8ce77a-e54a-411f-9f83-24a1e9728ed6/91668970060.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caa61212-e126-4450-adb0-646de7c85d67/57159388884.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_off000072a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72A8 5592 bytes
SHA-256: 6601ef92dcfd2e61c8699474dea788afba0ba5569001f506f646663d4a7737a3
font_01_sfnt_off0000858e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x858E 12020 bytes
SHA-256: 7e675d4379a85baed77078add8e69dfd43b52eb49e43a25f21f6ce7136812cc6

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