Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae315688a963f7c…

MALICIOUS

PDF

45.2 KB Created: 2020-10-28 11:27:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-10
MD5: 57a17b2f6c00b727161b3540d6a43ffa SHA-1: f5c90a6dccde2ed3df85f151625560801863f93c SHA-256: cae315688a963f7cd80e61edde10a0618f81e901b7aca47b8ecb940dd0d86635
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://cctraff.ru/123?keyword=laser+guide+rod+glock+19 In PDF document text
    • https://nukewixe.weebly.com/uploads/1/3/4/3/134385223/4387150.pdfIn PDF document text
    • https://kutusavirub.weebly.com/uploads/1/3/4/2/134265758/leraxilupijo.pdfIn PDF document text
    • https://popilezofale.weebly.com/uploads/1/3/1/1/131164236/7301557.pdfIn PDF document text
    • https://jejoduruledeg.weebly.com/uploads/1/3/4/3/134396934/d69e2dd255.pdfIn PDF document text
    • https://kolivobaka.weebly.com/uploads/1/3/4/5/134500933/jawewabadu-domawara.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367667/normal_5f9202ea65fef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366388/normal_5f8db4e32bdf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377717/normal_5f89d0e056264.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_5f915101d37c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382423/normal_5f8fd4f0e4b45.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006cf7.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006cf7.bin)
    • https://uploads.strikinglycdn.com/files/2f420462-c5ec-4ec6-8122-cb29cba89e8b/18121753852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a0c5ca9-57d8-4169-9f8c-c5a231eaba94/20750053501.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8fe88ed-5fc7-46a2-9596-c76b06ed82cb/65718168959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/2958/5830/files/gta_san_andreas_android_obb_1.08.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7763/1647/files/read_the_princess_bride_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8316/0999/files/90819185897.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/simon_unwin_analysing_architecture_download.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/zinum.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/30738456331.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/maths_formulas_for_class_8_icse.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/nevesu.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/entrepreneurship_and_business_management_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/things_between_you_and_me_novel_free_download.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 extracted file (font_00_sfnt_off00006cf7.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF7 5320 bytes
SHA-256: fac49a3a5015d8f252047bf59fdc435f0ab153ba1f42a5d6b03fbdb9e1ff33e2
font_01_sfnt_off00007f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F20 11852 bytes
SHA-256: 722f3e26cbf0ec45fd942510e3c8268dd1ef02d99f5c71c089edbedabaf15e68