Malicious PDF — malware analysis report

Static analysis result for SHA-256 74ca46b9e91766e3…

MALICIOUS

PDF

54.1 KB Created: 2020-11-06 19:13:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 13767aafb64934b66b03a5ea0e0206ee SHA-1: 2a23ee00ad76afbec89f501f676d73c752df78ff SHA-256: 74ca46b9e91766e38cb7df982cb302fe1763b8afa6f315bca7af4ed74ee72dc7
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/aws?keyword=toshiba+satellite+c855d+s5103+specs In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387814/normal_5f97c4c79a1a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408336/normal_5fa243cded8d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392649/normal_5f91049798261.pdfIn PDF document text
    • https://watuboxe.weebly.com/uploads/1/3/4/5/134588214/nupavoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385852/normal_5f8f35753853d.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/busixakowun_zefisuni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366359/normal_5f872d43ef121.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f8711d915507.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/fazuvide.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/desodoxefawasexa.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/xufaxoferugod/pop_music_trivia_questions_and_answers_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/82297058580.pdfIn PDF document text
    • https://gozodusi.files.wordpress.com/2020/11/71527164481.pdfIn PDF document text
    • https://gonugatak.files.wordpress.com/2020/11/fuwujisovixunokumamabi.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_off000091c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91C2 5828 bytes
SHA-256: 33f53a8512fd41d2b3480b60a554fb4548e6b244dea61d3e776ed27c223fc12d
font_01_sfnt_off0000a599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA599 11452 bytes
SHA-256: 23cf915731c8fe131c9ab1cbe9c0a31324c6cb5d866bf57740f8bb1c24c64b5c