Malicious PDF — malware analysis report

Static analysis result for SHA-256 4310ba132ebdc468…

MALICIOUS

PDF

42.3 KB Created: 2020-10-01 01:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e85c93f26fa9652635a64b0ea9d09d7b SHA-1: 62503823f60435488e657f60747f09a961875c2c SHA-256: 4310ba132ebdc4687dcb46d848d9d57eada680c982ffd5cce88fec479dabdf31
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=understanding+business+pdf+nickels In PDF document text
    • http://parokikak.prismaeventsllc.com/uploads/1/3/2/7/132710634/a5f5a9079f4f67.pdfIn PDF document text
    • http://sowutoja.maryhicksmetalarts.com/uploads/1/3/2/6/132682871/biwut-vuwubidomivu.pdfIn PDF document text
    • http://robawe.sustainabilitysciencelab.org/uploads/1/3/1/4/131438188/1374095.pdfIn PDF document text
    • https://site-1038653.mozfiles.com/files/1038653/bixoloviguna.pdfIn PDF document text
    • https://site-1037094.mozfiles.com/files/1037094/66797784974.pdfIn PDF document text
    • https://site-1038343.mozfiles.com/files/1038343/60807734875.pdfIn PDF document text
    • https://site-1036957.mozfiles.com/files/1036957/vuzujufilogudunu.pdfIn PDF document text
    • https://site-1036629.mozfiles.com/files/1036629/tivafixuxovatumisanomoz.pdfIn PDF document text
    • https://site-1037003.mozfiles.com/files/1037003/juwibarezuba.pdfIn PDF document text
    • https://site-1036951.mozfiles.com/files/1036951/81453211929.pdfIn PDF document text
    • https://site-1036960.mozfiles.com/files/1036960/nanowonikuvojivagibekam.pdfIn PDF document text
    • https://site-1036816.mozfiles.com/files/1036816/44227025190.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8706/3960/files/oceans_11_imdb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4002/6273/files/characteristics_of_african_traditional_religion.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_off00006616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6616 5516 bytes
SHA-256: fff52fe48948be4165f6cf5861ce5c3e348b3b7d201b82ed541a759a6ba64901
font_01_sfnt_off000078ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78ED 10336 bytes
SHA-256: dc05871599fbdd98a7e868476d1ff2c23c59961937eab679b8adf49904f0b809