Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd89677775d55ecc…

MALICIOUS

PDF

34.8 KB Created: 2020-11-08 20:33:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 3c6fac171f760bba9d7fcc5301492c83 SHA-1: 9a7a7eab3443f1646a629cf175dba25747835fa4 SHA-256: bd89677775d55ecc8b02e8ca72483e80bedb8227dda8cf519f0e049dfac16ca1
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://trafffi.ru/aws?keyword=grace+brethren+christian+school+waldorf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417024/normal_5f959fd657bed.pdfIn PDF document text
    • https://xikewewojan.weebly.com/uploads/1/3/4/0/134095915/1e08ae9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370294/normal_5f916fed3b503.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/97c518016dfbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375531/normal_5f9ca5e9dd489.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420248/normal_5fa7fa65451a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382958/normal_5f8fb0ff5cdf0.pdfIn PDF document text
    • https://zirufifun.weebly.com/uploads/1/3/0/8/130874679/1f8ec3833e188f.pdfIn PDF document text
    • https://miburinu.weebly.com/uploads/1/3/4/4/134464577/11244bca60e.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/8dfbdc6e-ed0f-4f2b-985c-bd5e79de2201/lakufigijewefuziv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b346e2de-3179-49a9-94c6-164276860677/95148908970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/045c11a3-4235-4fa6-9e02-3fbb962403f7/11004943644.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a09173d-8756-4c4d-9655-18d52d41aed2/werusajunagogu.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_off00004882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4882 5372 bytes
SHA-256: c47e644e0595ac2a9f9c6f5b34c6862d6f5241a9cf048a25857c344fdc358f0f
font_01_sfnt_off00005ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD0 10464 bytes
SHA-256: ff9e01f5a92214ed4ecc28b9205c6e9b289dc4082215397924fbff4c45a42357