Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c1a3a236a2c41a7…

MALICIOUS

PDF

42.0 KB Created: 2020-11-06 02:12:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 91d1c95cdf6fc3040cb6a7c2acfd0d46 SHA-1: 06c0cb0a3c8e87bfe65f28b2676e7afad940ec64 SHA-256: 8c1a3a236a2c41a79cb9686455c826515f2318be4d38c49c6ccace057ecc63b0
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://trafficel.ru/aws?keyword=frazier+park+school+district PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4390081/normal_5f8eb7f21b6bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388163/normal_5f96ea18bc11b.pdfIn PDF document text
    • https://zogeliwev.weebly.com/uploads/1/3/4/3/134353139/3349556.pdfIn PDF document text
    • https://kikuriniwabutip.weebly.com/uploads/1/3/4/4/134440093/fanoloraxal.pdfIn PDF document text
    • https://rowopubogapog.weebly.com/uploads/1/3/4/2/134234702/resomer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383791/normal_5f972a98a2406.pdfIn PDF document text
    • https://gewosawoma.weebly.com/uploads/1/3/0/7/130739201/jefarilebiku_lozora.pdfIn PDF document text
    • https://lamalirigade.weebly.com/uploads/1/3/4/5/134595912/8688286.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409417/normal_5f96f76a88441.pdfIn PDF document text
    • https://debasomi.weebly.com/uploads/1/3/0/7/130739769/84ed3efc478.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366358/normal_5f8b75595682c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375700/normal_5f8bb453a05a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412606/normal_5fa488e286de6.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/jebupofedijakuk/zegamizo.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/juvegipebugirafo.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_off000066e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66E9 5232 bytes
SHA-256: 3fbc0493f924608d7166fa7f3b533db9b57777a04f633f63fcbf68f2c7d20027
font_01_sfnt_off000078b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78B6 10180 bytes
SHA-256: a877aacbedb9add1721772e8cd51eeaff9e36c76c2a1da593746277ae7e56b41