Malicious PDF — malware analysis report

Static analysis result for SHA-256 89aeef4e1a2a3572…

MALICIOUS

PDF

38.2 KB Created: 2020-10-01 19:42:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f663de3e5536a7de51b18a543ce332e8 SHA-1: 6b2d9596bab822a2d500f082f6b8ae3c48b4f16d SHA-256: 89aeef4e1a2a3572f4ff2a1093e14f887ece3ddf0f14eb0b36cdf05b07931641
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/strik?keyword=c%25E1%25BA%25AFt+file+pdf+th%25C3%25A0nh+%25E1%25BA%25A3nh In PDF document text
    • https://site-1038827.mozfiles.com/files/1038827/68284099869.pdfIn PDF document text
    • https://site-1036728.mozfiles.com/files/1036728/xoraveruxerafawes.pdfIn PDF document text
    • https://site-1036996.mozfiles.com/files/1036996/potebukinazida.pdfIn PDF document text
    • http://files.henshaw-lab.com/uploads/1/3/1/0/131070572/vitel.pdfIn PDF document text
    • http://files.siblingsandcompany.com/uploads/1/3/1/3/131398184/jiwivofijozevozew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7397/9043/files/xomije.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5028/9320/files/yawning_portal_map_5e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/0480/5287/files/bosch_11316evs_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5106/5243/files/14662533320.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7593/5134/files/65477407368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eaf4b44-dbd6-4ac2-90d7-1b843d419f04/nesukes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57eb0f0a-3347-4723-a2bd-d6ec8830d340/72810199024.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bc12db9-b4b4-4729-8fb8-3dabe27308d1/dukarorupogi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/155ca339-df35-4146-898e-cf78f379b7e2/46077046078.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_off0000571c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x571C 5336 bytes
SHA-256: 43acfc9967c429e856c6fccb1dcf0e1fa458c93f7d10867e90324bba57a80181
font_01_sfnt_off00006817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6817 10028 bytes
SHA-256: c392a180244bd218553a36fe97e52027f09afd768303060056b2a58a72b72210

Open this report in the interactive analyzer, or submit your own file for analysis.