Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bc015d5a81aa47c…

MALICIOUS

PDF

54.9 KB Created: 2020-11-09 14:19:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 1f5e267debf668551eba5843599a26e6 SHA-1: d6b64813a5eb35ee4ce95659d60ac11cd25b7249 SHA-256: 8bc015d5a81aa47c09e99c7e2af6b55fcadae24cd2d9cb2021e5420952ad9a23
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://traffking.ru/123?keyword=hillside+park+dexter+maine In PDF document text
    • https://jimagofer.weebly.com/uploads/1/3/0/8/130813953/18bfa8f9f1d.pdfIn PDF document text
    • https://leruzifu.weebly.com/uploads/1/3/2/3/132302941/tewenizobaxuva-tewuvabiximo-losajefoto-wasotavolav.pdfIn PDF document text
    • https://risimukino.weebly.com/uploads/1/3/1/3/131383953/titaxumuleg.pdfIn PDF document text
    • https://vamarimorojikav.weebly.com/uploads/1/3/4/6/134640123/gokagovaponija.pdfIn PDF document text
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/pokivipikog_kajotora_toguki_bixawoxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383918/normal_5f8c3b5479cc5.pdfIn PDF document text
    • https://pujuferot.weebly.com/uploads/1/3/4/6/134657525/nabokir.pdfIn PDF document text
    • https://xanodupujariris.weebly.com/uploads/1/3/0/9/130969381/kirib-rovuwuwa.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/tiladejonu.pdfIn PDF document text
    • https://fisalusul.weebly.com/uploads/1/3/4/3/134341538/45b606.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/gisobaxa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bulozor/bunting_flag_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000089e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89E0 4876 bytes
SHA-256: 3208149ea204100e095e1fd1dbb53eaa09b474fd2a522688f984f6116f07fa9e
font_01_sfnt_off00009a3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A3F 12176 bytes
SHA-256: 2ad1e34b9805db28dd3fa57f159da6c725a852f2c52707ca802126829ade8543
font_02_sfnt_off0000c0da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0DA 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f