Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc9db43afed8347a…

MALICIOUS

PDF

42.0 KB Created: 2020-10-31 02:22:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 000db8ef2f07293476c80de3532ba8ec SHA-1: 5328c55448e5b196bad835527d544e29003a0bdc SHA-256: fc9db43afed8347a748eb490e740594904b53c05f3010c4259df233296d55053
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://ttraff.link/pify?keyword=cursive+capital+letter+r In PDF document text
    • https://nirilixurem.weebly.com/uploads/1/3/4/4/134474770/sutopo.pdfIn PDF document text
    • https://vodoxakitukep.weebly.com/uploads/1/3/4/3/134335140/5b280d.pdfIn PDF document text
    • https://jizonuwuko.weebly.com/uploads/1/3/0/8/130814311/476d4813f.pdfIn PDF document text
    • https://numuxubolab.weebly.com/uploads/1/3/4/3/134382028/suxifagiroxo.pdfIn PDF document text
    • https://pudijubo.weebly.com/uploads/1/3/4/3/134311311/tiruxutigidofibigiw.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/jolon_koxuzozudanik_makilitinami.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/vavabi/gisosiligapurelan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6865/2697/files/govebu.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/rivutobujop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d066703-90b8-44ea-84ae-950483850162/14060663128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/5102/2001/files/jotipevuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44823aff-d963-4fe3-9400-e091e0954558/76456539069.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/91868028059.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4f5fc75-6237-4833-9d43-2339b9903fdc/pro_sharepoint_designer_2013_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dead9ea-80df-433d-b139-bb65066be9f0/83972308268.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_off0000675c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x675C 4892 bytes
SHA-256: d214683f6d9106ccb8300dc4f2a4fc10b5886cad348fdeba7eba71c0fcf1afa1
font_01_sfnt_off00007814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7814 10360 bytes
SHA-256: e881e1be76c2cd69b2cf08e758eef50437a5855891143bf0d94d626f77ad3e7e

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