Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1e77e2f40775721…

MALICIOUS

PDF

58.4 KB Created: 2020-10-28 09:07:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 31fbe4155f3312682abd83c18c60b773 SHA-1: 6a7990389c5f3c8e7f7002146719306f62d58b5e SHA-256: c1e77e2f407757210ed98c35a115654fae0356b1e0d76f2b141aec497ab5a98e
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://ggtraff.ru/strik?keyword=crestone+peak+resources+acquisition In PDF document text
    • https://sifizebutu.weebly.com/uploads/1/3/0/8/130814914/2075510.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/954ec9.pdfIn PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/kuvibusujuwezij-giwigupi-pagepavorapij.pdfIn PDF document text
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/bodajetosason-bipejugibelumar-dupatiror-zabupuzuta.pdfIn PDF document text
    • https://fukikabigo.weebly.com/uploads/1/3/4/4/134457586/6625053.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376602/normal_5f8a4c28055fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371246/normal_5f970aef7464d.pdfIn PDF document text
    • https://lesajevix.weebly.com/uploads/1/3/4/3/134318042/nogejejematuxumat.pdfIn PDF document text
    • https://kamijiruwidezi.weebly.com/uploads/1/3/4/3/134387945/6528c6d45b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380695/normal_5f8d01598f5b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368751/normal_5f8fcf19434f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382003/normal_5f8b7edbad5ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369631/normal_5f8f007ca06e3.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/tofizo/buried_child_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/bodoz.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/pdf_annotation_tool_ios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0642/5249/files/power_levels_of_super_saiyan_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/7620/3707/files/brabazon_golf_course_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7727/8627/files/xatezaximolilil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8996/9820/files/big_air_buena_park_prices.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_off0000a789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA789 4992 bytes
SHA-256: cdf9d186e5d8b1089a0e958cea3f69e05af9d88a53684f2e9c4507bb5e192448
font_01_sfnt_off0000b893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB893 10552 bytes
SHA-256: 76ecc9cdbd691418869edaa372b87d60be1fdf3a07abf2c4b9e457655f87a955