Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0fbdeb0865c2b87…

MALICIOUS

PDF

45.6 KB Created: 2020-11-09 15:14:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: ad0020082fdb1f36355d75a5eafabac7 SHA-1: a3a7a85019cd3a6ae3912dc56d7fc00e30e7909d SHA-256: c0fbdeb0865c2b87f544648039942245018f39f1ccc6674b8716217dd412f705
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffine.ru/123?keyword=a+guide+to+yellow+stripey+things In PDF document text
    • https://jajewivazag.weebly.com/uploads/1/3/4/4/134491582/88630.pdfIn PDF document text
    • https://jijalasigode.weebly.com/uploads/1/3/4/3/134344414/liluxabi_mudov_supuriduroko_kubajidaliwoki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_5fa35a3263b51.pdfIn PDF document text
    • https://gukaguse.weebly.com/uploads/1/3/1/3/131398473/9749096.pdfIn PDF document text
    • https://ruwadegefanum.weebly.com/uploads/1/3/4/1/134108857/9d4cdbbf68cc6.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/5686684.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370278/normal_5f8fb790cba03.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/7360136.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vavale/collaboration_begins_with_you.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc3e8f07-b42b-4eb4-8835-904f54ed3b25/70736261507.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/169f55ac-6cf5-4f74-b9e1-c817e2e3b1e9/51191970705.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_off0000743f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x743F 5192 bytes
SHA-256: c57bafe7bb0d23aeb7966074f541d3f87503af1e4a6ac984641c4dfdd0467a2f
font_01_sfnt_off000085fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85FB 10488 bytes
SHA-256: db4607ed9ace24c1cb6bb485959c9b982da0de954ba7f57231766435152baeca