Malicious PDF — malware analysis report

Static analysis result for SHA-256 b014c81329a93793…

MALICIOUS

PDF

40.8 KB Created: 2020-10-04 23:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a5407e8aa80df7c74f4e34708b19de09 SHA-1: 6050684d0e8e6f08ec7f8fde00532bd664196819 SHA-256: b014c81329a93793457a7597cd50adef1e574bc0defe2317052150590cc99177
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=pig+heart+dissection+lab+worksheet+a In PDF document text
    • http://pibasom.michellefletchall.com/uploads/1/3/1/4/131407763/1798956.pdfIn PDF document text
    • http://kulak.roundupforautism.org/uploads/1/3/1/6/131606066/09ed218808.pdfIn PDF document text
    • http://files.thewaveindustries.com/uploads/1/3/1/3/131398094/15d130eb16.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/65c1ff15-4471-45f9-9cee-fd6aadbda603/94768424576.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b15f1335-db3f-4bc3-932f-e968fcb86566/34096416378.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb9cd478-da20-4823-b658-c5bb3a486ec2/jinola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f381148-c8cb-4b57-b892-fc7e0df10dbf/23910048739.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0435d584-f370-4953-8af3-f0a99b807f10/98394022711.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d662ee2-222c-4a88-b38f-41fae10a6c15/82084919372.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4feea93-f988-4592-bc6e-a2908cac954d/95682032431.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9ebe5dc-2529-4fbd-8698-446c29b28d64/jijewomamukoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcb71481-67f9-4137-9d04-0ead559ec578/rivagera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b3fe6a2-0c0a-47ca-8906-4d54a7318584/30662313635.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe28e1be-de32-4d96-ba77-17d21ee43d8d/duwifolipipimixezan.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_off00006191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6191 5496 bytes
SHA-256: 08f3dc3c1169c84848011d55737624fd3d4563309c6b53e746c3d3b48c0e309b
font_01_sfnt_off00007450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7450 10016 bytes
SHA-256: ded49c8686cb2c022bf4b06e0cbbea326d23f49f4779e2655c776ab122eb479e

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