Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb10284ca6283579…

MALICIOUS

PDF

51.8 KB Created: 2020-11-05 18:14:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: dea81c20ea8e16672cb308dcb2333edb SHA-1: 1c94f22e2fd51ffe44d2a5d9d2a7f53ce5fa7381 SHA-256: fb10284ca62835790aa9ae38ab84d94cb10c95c8d522bbd9dce45373adc5b9f7
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/aws?keyword=south+lafourche+high+school+faculty PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5f87248479ff5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369908/normal_5f8acc28bfa14.pdfIn PDF document text
    • https://sewuvemap.weebly.com/uploads/1/3/4/3/134377394/robazafosurawupovu.pdfIn PDF document text
    • https://sifizebutu.weebly.com/uploads/1/3/0/8/130814914/remofesijez.pdfIn PDF document text
    • https://zemuxarasojutin.weebly.com/uploads/1/3/4/3/134374283/widisexenulenugaxur.pdfIn PDF document text
    • https://wavixupenug.weebly.com/uploads/1/3/4/3/134386336/3022751.pdfIn PDF document text
    • https://vajibenutiw.weebly.com/uploads/1/3/4/4/134487234/5892387.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/gowimeter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403131/normal_5fa1328153679.pdfIn PDF document text
    • https://xasuvakem.weebly.com/uploads/1/3/4/4/134400919/239c2dc5ba9.pdfIn PDF document text
    • https://juzatimeb.weebly.com/uploads/1/3/4/6/134605854/7442061.pdfIn PDF document text
    • https://witirasa.weebly.com/uploads/1/3/4/5/134525236/4969244.pdfIn PDF document text
    • https://lusekovipe.weebly.com/uploads/1/3/4/2/134234723/8269935.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366024/normal_5f86f6a1ea8cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445726/normal_5f9ed49fc3583.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00008963.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00008963.bin)
    • https://cdn.shopify.com/s/files/1/0502/9865/0797/files/54654586886.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_off00008963.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8963 5348 bytes
SHA-256: 1f822d9c07987f5a08e7df8417a89060e2d3faaad30ec2071fe4cfa4d06ac52c
font_01_sfnt_off00009b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B9E 10720 bytes
SHA-256: 26823e7c63f1820193b49c14f7204c38b420a7744ce981d73b6c439b5750d0e4