Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc3d70c5eabbc4c4…

MALICIOUS

PDF

40.3 KB Created: 2020-10-30 14:34:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c5ecdae2e2b8f14e78a688d22337c68a SHA-1: 91098bda07141468d260e5abfb8c8e38a6420368 SHA-256: cc3d70c5eabbc4c4f4dc4d57d2d107591592bfc122c2195951e342b7d3ea0f88
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/aws?keyword=waterpik+aquarius+professional+water+flosser+wp-670 In PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/2691167.pdfIn PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/81e6e5169ecb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388608/normal_5f95937ba4f9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f8ccc9e555fe.pdfIn PDF document text
    • https://basuxebuj.weebly.com/uploads/1/3/1/3/131379820/gafolox_fuwatusipus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379359/normal_5f992d73cc252.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/vonorukabezet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382209/normal_5f8c1bcddd2d8.pdfIn PDF document text
    • https://reninifovebomul.weebly.com/uploads/1/3/4/3/134361606/4599541.pdfIn PDF document text
    • https://xomevore.weebly.com/uploads/1/3/4/3/134346529/wimifekomexix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381964/normal_5f8bfbc820d25.pdfIn PDF document text
    • https://guvapokasek.weebly.com/uploads/1/3/4/4/134437462/f2093eaad023.pdfIn PDF document text
    • https://gupaxapofigovi.weebly.com/uploads/1/3/4/3/134356466/dadebano_kuwebedadajor_tebepotu.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/tamobalasu/jaco_de_bruyn_instagram.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_off000059ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59EF 5596 bytes
SHA-256: 28a6d817db45e771476bba92fbd709c571ddd8aafe607906410e8ed8ddfbda65
font_01_sfnt_off00006d3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3D 11452 bytes
SHA-256: 1b377c163e8efde22af1cd2da31446856ae3e4adc7c8d830995bd3d8feb99582