Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ed64ecc089bc4b…

MALICIOUS

PDF

60.3 KB Created: 2020-11-08 13:32:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 8ca9fb9c30f91a5109fa478bfd7cc751 SHA-1: 6f16aca33b82e41d2fec922828348441a4238372 SHA-256: 94ed64ecc089bc4b1994758add921b5fa0885deb137bea30c985280442d9f2f0
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/aws?keyword=quotes+by+nick+carraway+in+the+great+gatsby In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373782/normal_5f894e44c0e65.pdfIn PDF document text
    • https://loraxero.weebly.com/uploads/1/3/4/3/134332649/988ce3a7f3a3ea.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/7343d8ed-84ad-4318-a17a-569443bc9351/dinamica_de_integracin.pdfIn PDF document text
    • https://minezonateta.files.wordpress.com/2020/11/39581500676.pdfIn PDF document text
    • https://nejokufa.files.wordpress.com/2020/11/arthropods_coloring_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1bb7682-20ef-4f21-aaea-973faa470349/zuwugeradaxokuvonowunesid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb3464a0-2f4a-4643-8a62-b2bff3c671fd/13090926678.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a636ae8-ec0b-4439-803e-e46599a6cb6e/dragonborn_gallery_guide.pdfIn PDF document text
    • https://zitatotifewe.files.wordpress.com/2020/11/89388487589.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3956b608-9019-408d-ae66-6e119b2b58c5/romixeturefuduj.pdfIn PDF document text
    • https://xukepuf.files.wordpress.com/2020/11/loreto_sesma_me_gustaria.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_off0000ad69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD69 5488 bytes
SHA-256: e001ecfd7343edbe4d901aaa76781ef65dfd3ca070d7917ee17e58bc90e93dd3
font_01_sfnt_off0000c031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC031 10736 bytes
SHA-256: 3e2723c59c472d9e952a4d398141e42ee5e4ea379444861cfb44231a73ea377a