Malicious PDF — malware analysis report

Static analysis result for SHA-256 c49780d790fdf3a2…

MALICIOUS

PDF

54.3 KB Created: 2020-10-15 19:43:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bdbccd81485aee57eaf2d0c22da24929 SHA-1: a622b100bf6439276d1fd0a97cb3d934a42dd57a SHA-256: c49780d790fdf3a20e94930b1ad0895e6990b80e0e6afca0862a7d770ec35ee0
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/123?keyword=opc+ua+spec+pdf In PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/jolon_koxuzozudanik_makilitinami.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/beparinunij.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/4144282.pdfIn PDF document text
    • https://vevejeda.weebly.com/uploads/1/3/0/7/130776099/9009541.pdfIn PDF document text
    • https://lifagixuwemup.weebly.com/uploads/1/3/0/9/130969738/9000884.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368782/normal_5f881a04d7c57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5f87214ee7ea9.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/1429013.pdfIn PDF document text
    • https://vefoxetewezelir.weebly.com/uploads/1/3/1/4/131483279/rixini.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rezareludufiven-voxodopi.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/zuvefusu_tewojawowebav.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/2a5b38eef3430.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/0b81e133d03a436.pdfIn PDF document text
    • https://waniremupamed.weebly.com/uploads/1/3/1/4/131407535/b6f37a.pdfIn PDF document text
    • https://site-1039143.mozfiles.com/files/1039143/mavilabotinidovomut.pdfIn PDF document text
    • https://site-1036655.mozfiles.com/files/1036655/85464094869.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/4f9837ef-69ee-4c90-8355-f2fd0b021d75/wozararotiwuri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc646270-6d90-4a68-afb2-e316eb470cba/80982654391.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df50b05c-7257-4633-8928-29a2344810fd/nikojuxid.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_off0000983e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x983E 5048 bytes
SHA-256: be0a6cfdea56d5fb21d7f586232ca61f3a3b0aac6360345fb2e7db3367479f4a
font_01_sfnt_off0000a97b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA97B 10144 bytes
SHA-256: dafcf66435fb443d35f0f83be20ddaa9d9d89d1949e633c68ac78aa2c1cb1998

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