Malicious PDF — malware analysis report

Static analysis result for SHA-256 33762cb5c16b969d…

MALICIOUS

PDF

40.9 KB Created: 2020-10-01 21:20:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 51d19024bb88ae80dbcc3225ec378263 SHA-1: eab69ec06aef5fa5262c33d18f0bf63a402dba20 SHA-256: 33762cb5c16b969d3ff61e225e0b9d378f3b0791f612e84d45d5cc97813e6baf
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://cctraff.ru/strik?keyword=inverter+welding+machine+circuit+board+pdf In PDF document text
    • http://debenoped.karlschwiesow.com/uploads/1/3/1/4/131409090/wegevuredoz.pdfIn PDF document text
    • http://nuzodape.jjohnsonartist.com/uploads/1/3/1/6/131606295/cd7dd.pdfIn PDF document text
    • http://files.rodinfarms.com/uploads/1/3/1/4/131454373/4914877.pdfIn PDF document text
    • http://files.inyourpacefitness.com/uploads/1/3/2/6/132681426/1429172.pdfIn PDF document text
    • https://site-1036750.mozfiles.com/files/1036750/datakanu.pdfIn PDF document text
    • https://site-1038552.mozfiles.com/files/1038552/giduvabib.pdfIn PDF document text
    • https://site-1039476.mozfiles.com/files/1039476/lipirulefepo.pdfIn PDF document text
    • https://site-1038397.mozfiles.com/files/1038397/7352959669.pdfIn PDF document text
    • https://site-1039257.mozfiles.com/files/1039257/xepobopumizew.pdfIn PDF document text
    • http://rebub.etherealbeautyeliteartistry.com/uploads/1/3/0/7/130738711/5218782.pdfIn PDF document text
    • http://files.kcrollerwarriors.com/uploads/1/3/0/7/130776409/zimupazibib_bujoku_jidowusenu.pdfIn PDF document text
    • http://files.clinicalpsychologyservices.com/uploads/1/3/0/7/130775318/lovixevixizikake.pdfIn PDF document text
    • http://files.informixcommunity.com/uploads/1/3/1/8/131871727/sibakina-padugagaja.pdfIn PDF document text
    • http://sivemada.snellautowash.com/uploads/1/3/0/8/130874498/8402343.pdfIn PDF document text
    • http://files.asiaticofusion.net/uploads/1/3/1/3/131383247/xadisugowapar-ridumofa-foxawake-fujoj.pdfIn PDF document text
    • http://xojevuvo.perchingwolfstudios.net/uploads/1/3/2/3/132303238/6690855.pdfIn PDF document text
    • http://files.cooksbeachresort.com/uploads/1/3/1/4/131437601/5240872.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00006118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6118 5620 bytes
SHA-256: b75188ade13808f2442098c0800bc688784eeb8f6560f25789ccec5484cd6d0a
font_01_sfnt_off0000741c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x741C 10188 bytes
SHA-256: 7f554c1acb9462954d32f88a11158555c6ee95d5321d9763d30df4035d67b21b