Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa85526ae88f5910…

MALICIOUS

PDF

44.2 KB Created: 2020-10-08 20:54:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 8c3377a9b0d2a24d22b5bccf5e63fc78 SHA-1: 5dccc0ed65360acb49fd80553c21f792ac369001 SHA-256: fa85526ae88f5910e822ab96f659991720caab550fbcd5f87db24e59b5f1595d
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://gettraff.ru/strik?keyword=araba+yar%25C4%25B1%25C5%259F+oyunu+apk+hile+indir In PDF document text
    • http://files.silvabuilt.com/uploads/1/3/2/7/132740637/bidizegizebe-dijetekibob.pdfIn PDF document text
    • http://files.nborm.com/uploads/1/3/2/7/132740214/bisabodolujisiw_wononepebijit_xogudogo_xanube.pdfIn PDF document text
    • http://jixalewix.pittprojectrishi.org/uploads/1/3/1/8/131871729/8684558.pdfIn PDF document text
    • http://files.womensquartermarathon.com/uploads/1/3/1/4/131483153/fonapudonijepirake.pdfIn PDF document text
    • http://files.stmaryspontiac.org/uploads/1/3/0/9/130969717/litimi.pdfIn PDF document text
    • https://site-1038312.mozfiles.com/files/1038312/6614942262.pdfIn PDF document text
    • https://site-1040101.mozfiles.com/files/1040101/nesazogemu.pdfIn PDF document text
    • https://site-1040180.mozfiles.com/files/1040180/kuxoxonolijasug.pdfIn PDF document text
    • https://site-1039346.mozfiles.com/files/1039346/pavojovojusasu.pdfIn PDF document text
    • https://site-1038358.mozfiles.com/files/1038358/33419445271.pdfIn PDF document text
    • https://site-1038538.mozfiles.com/files/1038538/67285487080.pdfIn PDF document text
    • https://site-1036681.mozfiles.com/files/1036681/kogala.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/50158024-54bd-4c1d-b9bb-75890eaef082/fafunisapukow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06e5c179-3c87-46ad-91eb-be9d1f3f5331/92318576737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b64fdfcc-faab-43ce-8acb-27b8eb9c7216/9053035538.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb31ef53-bd8e-43ea-b05d-9eb10169c7cb/6527770680.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_off00006e3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E3A 5444 bytes
SHA-256: 79a649fb9475e43f1c8d5fee0652932b0c1198acb2859d90dc08358b3dcd4c80
font_01_sfnt_off000080b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80B8 10720 bytes
SHA-256: 28f686f46e6db6562b15f0df2a98ab723344e71156eb59b88408e98fa3262aec